/* ========================================
   VIHAIR LANDING PAGE - ULTRA LUXURY EDITION
   Maximum Conversion & Premium Feel
   Style: Ultra-Premium Night Tech Grooming
   ======================================== */

/* ----------------------------------------
   CSS CUSTOM PROPERTIES — LUXURY PALETTE
   ---------------------------------------- */
:root {
    /* Deep Luxury Colors */
    --bg-void: #020204;
    --bg-primary: #040406;
    --bg-secondary: #06070a;
    --bg-tertiary: #0a0b10;
    --bg-elevated: #0e1016;
    --bg-card: rgba(6, 7, 10, 0.95);
    --bg-card-hover: rgba(10, 11, 16, 0.98);
    --bg-glass: rgba(255, 255, 255, 0.015);
    --bg-glass-strong: rgba(255, 255, 255, 0.03);
    
    /* Premium Accent — Refined Turquoise */
    --accent-primary: #00e5ff;
    --accent-secondary: #00bcd4;
    --accent-tertiary: #0097a7;
    --accent-glow: rgba(0, 229, 255, 0.5);
    --accent-dim: rgba(0, 229, 255, 0.15);
    --accent-subtle: rgba(0, 229, 255, 0.08);
    --accent-micro: rgba(0, 229, 255, 0.04);
    
    /* Gold Accent for Luxury Touch */
    --gold-primary: #d4af37;
    --gold-dim: rgba(212, 175, 55, 0.2);
    
    /* Text Hierarchy */
    --text-white: #ffffff;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --text-subtle: #475569;
    
    /* Premium Gradients */
    --gradient-hero: linear-gradient(180deg, 
        #020204 0%, 
        #040406 15%,
        #06070a 40%, 
        #040406 70%,
        #020204 100%);
    --gradient-radial-top: radial-gradient(ellipse 100% 60% at 50% -20%, 
        var(--accent-dim) 0%, 
        transparent 70%);
    --gradient-radial-center: radial-gradient(ellipse 80% 50% at 50% 50%, 
        var(--accent-micro) 0%, 
        transparent 70%);
    --gradient-card: linear-gradient(165deg, 
        rgba(255, 255, 255, 0.04) 0%, 
        rgba(0, 229, 255, 0.02) 50%,
        transparent 100%);
    --gradient-btn: linear-gradient(135deg, 
        var(--accent-primary) 0%, 
        var(--accent-secondary) 50%,
        var(--accent-tertiary) 100%);
    --gradient-btn-hover: linear-gradient(135deg, 
        #33eaff 0%, 
        var(--accent-primary) 50%,
        var(--accent-secondary) 100%);
    --gradient-shine: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.15) 50%, 
        transparent 100%);
    --gradient-text: linear-gradient(135deg, 
        var(--accent-primary) 0%, 
        #33eaff 50%,
        var(--accent-primary) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Letter Spacing */
    --ls-tighter: -0.03em;
    --ls-tight: -0.02em;
    --ls-normal: 0;
    --ls-wide: 0.02em;
    --ls-wider: 0.05em;
    --ls-widest: 0.1em;
    --ls-ultra: 0.2em;
    
    /* Spacing Scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
    
    /* Transitions */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --duration-fast: 200ms;
    --duration-base: 400ms;
    --duration-slow: 600ms;
    --duration-slower: 800ms;
    
    /* Shadows — Multi-layered Luxury */
    --shadow-sm: 
        0 1px 2px rgba(0, 0, 0, 0.5),
        0 2px 4px rgba(0, 0, 0, 0.4);
    --shadow-md: 
        0 4px 8px rgba(0, 0, 0, 0.5),
        0 8px 16px rgba(0, 0, 0, 0.4),
        0 16px 32px rgba(0, 0, 0, 0.3);
    --shadow-lg: 
        0 8px 16px rgba(0, 0, 0, 0.5),
        0 16px 32px rgba(0, 0, 0, 0.4),
        0 32px 64px rgba(0, 0, 0, 0.3),
        0 64px 128px rgba(0, 0, 0, 0.2);
    --shadow-glow: 
        0 0 30px var(--accent-glow),
        0 0 60px var(--accent-dim),
        0 0 100px var(--accent-subtle);
    --shadow-glow-intense: 
        0 0 40px var(--accent-glow),
        0 0 80px var(--accent-glow),
        0 0 120px var(--accent-dim);
    --shadow-product: 
        0 30px 60px rgba(0, 0, 0, 0.6),
        0 60px 120px rgba(0, 229, 255, 0.1),
        0 0 150px var(--accent-subtle);
    
    /* Container */
    --container-padding: 20px;
    --container-max-width: 1280px;
}

/* ----------------------------------------
   RESET & BASE
   ---------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    /* scroll-behavior: smooth; — disabled in favor of JS smooth scroll with easing */
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-regular);
    font-size: 1rem;
    line-height: 1.7;
    letter-spacing: var(--ls-normal);
    color: var(--text-primary);
    background-color: var(--bg-void);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    font-weight: var(--font-weight-bold);
    margin: 0;
}

::selection {
    background: var(--accent-dim);
    color: var(--text-white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
    border: none;
    outline: none;
}

/* ----------------------------------------
   UTILITY CLASSES
   ---------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--ls-tight);
    color: var(--text-white);
    margin-bottom: var(--space-12);
    text-shadow: 0 0 60px var(--accent-subtle);
}

.section-title--center {
    text-align: center;
}

/* ----------------------------------------
   SUBTLE SECTION SEPARATORS
   ---------------------------------------- */
section + section {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: inset 0 1px 0 rgba(0, 229, 255, 0.05);
}

/* ----------------------------------------
   SUBTLE SECTION SEPARATORS
   ---------------------------------------- */
section + section {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: inset 0 1px 0 rgba(0, 229, 255, 0.05);
}

/* ----------------------------------------
   ANIMATIONS
   ---------------------------------------- */
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-8px) rotate(0.5deg); }
    75% { transform: translateY(-4px) rotate(-0.5deg); }
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce-subtle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes glow-pulse {
    0%, 100% { 
        box-shadow: 0 0 20px var(--accent-subtle), 0 0 40px var(--accent-micro);
    }
    50% { 
        box-shadow: 0 0 30px var(--accent-dim), 0 0 60px var(--accent-subtle);
    }
}

/* ----------------------------------------
   BUTTONS — Luxury CTA
   ---------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-10);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    line-height: 1.2;
    text-align: center;
    border-radius: var(--radius-lg);
    transition: all var(--duration-base) var(--ease-out-expo);
    min-height: 60px;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-shine);
    transform: translateX(-100%);
    transition: transform var(--duration-slow) var(--ease-out-expo);
}

.btn--primary {
    background: var(--gradient-btn);
    color: var(--bg-void);
    box-shadow: var(--shadow-md), 0 0 40px var(--accent-subtle);
}

.btn--primary:hover {
    background: var(--gradient-btn-hover);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.btn--primary:hover::before {
    transform: translateX(100%);
}

.btn--primary:active {
    transform: translateY(-2px) scale(1.01);
}

.btn--secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-micro);
}

.btn--secondary:hover {
    background: var(--accent-subtle);
    transform: translateY(-4px);
    box-shadow: 0 0 40px var(--accent-subtle);
}

.btn--full {
    width: 100%;
}

.btn__loader {
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    animation: spin 1s linear infinite;
}

/* ----------------------------------------
   SECTION 1: HERO — Maximum Impact
   ---------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    padding: var(--space-20) 0 var(--space-16);
    overflow: hidden;
}

.hero__ambient {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 200%;
    height: 150%;
    background: var(--gradient-radial-top);
    pointer-events: none;
    animation: pulse-glow 5s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: linear-gradient(to top, var(--bg-void), transparent);
    pointer-events: none;
}

.hero__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-10);
    position: relative;
    z-index: 1;
}

.hero__text {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    max-width: 700px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-5);
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-ultra);
    text-transform: uppercase;
    color: var(--accent-primary);
    background: var(--accent-micro);
    border: 1px solid var(--accent-subtle);
    border-radius: var(--radius-full);
    width: fit-content;
    margin: 0 auto var(--space-4);
}

.hero__title {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    letter-spacing: var(--ls-tight);
    color: var(--text-white);
    text-shadow: 0 0 80px var(--accent-subtle);
}

.hero__subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: var(--font-weight-medium);
    color: var(--accent-primary);
    line-height: 1.4;
    letter-spacing: var(--ls-wide);
    text-shadow: 0 0 40px var(--accent-dim);
    margin-top: var(--space-2);
}

.hero__context {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-regular);
    color: var(--text-secondary);
    letter-spacing: var(--ls-wide);
    margin-top: calc(var(--space-1) * -1);
    margin-bottom: var(--space-1);
    opacity: 0.85;
    font-style: italic;
}

@media (min-width: 768px) {
    .hero__context {
        font-size: 0.875rem;
    }
}

.hero__description {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 520px;
    margin: 0 auto;
}

.hero__cta-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-3);
    opacity: 0.8;
    letter-spacing: var(--ls-wide);
}

.hero__cta {
    margin-top: var(--space-8);
    align-self: center;
    min-width: 260px;
}

.hero__image {
    width: 100%;
    max-width: 380px;
    display: flex;
    justify-content: center;
    position: relative;
    transform: translateX(20px) scale(1.1);
    margin-right: -20px;
}

.hero__image::after {
    content: '';
    position: absolute;
    inset: -10% -12%;
    background: radial-gradient(ellipse at 50% 50%, transparent 0%, transparent 45%, rgba(2, 2, 4, 0.45) 65%, rgba(2, 2, 4, 0.85) 85%, rgba(2, 2, 4, 1) 100%);
    pointer-events: none;
    z-index: 2;
}

.hero__image-glow {
    display: none;
}

.hero__product {
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: none;
    mix-blend-mode: lighten;
    position: relative;
    z-index: 1;
    transition: all var(--duration-slow) var(--ease-out-expo);
}

@media (min-width: 1024px) {
    .hero__image {
        -webkit-mask-image: radial-gradient(ellipse at 50% 50%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 40%, rgba(0, 0, 0, 0.25) 60%, rgba(0, 0, 0, 0) 85%);
        mask-image: radial-gradient(ellipse at 50% 50%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 40%, rgba(0, 0, 0, 0.25) 60%, rgba(0, 0, 0, 0) 85%);
        -webkit-mask-repeat: no-repeat;
        mask-repeat: no-repeat;
        -webkit-mask-size: 120% 120%;
        mask-size: 120% 120%;
        -webkit-mask-position: center;
        mask-position: center;
    }

    .hero__image::after {
        opacity: 0.9;
    }

    .hero__product {
        -webkit-mask-image: radial-gradient(ellipse at 50% 50%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 35%, rgba(0, 0, 0, 0.2) 55%, rgba(0, 0, 0, 0) 80%);
        mask-image: radial-gradient(ellipse at 50% 50%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 35%, rgba(0, 0, 0, 0.2) 55%, rgba(0, 0, 0, 0) 80%);
        -webkit-mask-repeat: no-repeat;
        mask-repeat: no-repeat;
        -webkit-mask-size: 130% 130%;
        mask-size: 130% 130%;
        -webkit-mask-position: center;
        mask-position: center;
    }
}

.hero__image:hover .hero__product {
    transform: none;
    filter: none;
}

.hero__scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-dim);
    font-size: 0.75rem;
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    animation: bounce-subtle 2s ease-in-out infinite;
    z-index: 2;
}

.hero__scroll-indicator svg {
    opacity: 0.5;
}

/* ----------------------------------------
   SECTION 2: PROBLEMS — Glass Cards
   ---------------------------------------- */
.problems {
    position: relative;
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
    overflow: hidden;
}

.problems::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent);
}

.problems::after {
    content: '';
    position: absolute;
    left: 10%;
    right: 10%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.25), transparent);
    opacity: 0.6;
    pointer-events: none;
}

.problems__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../assets/6db0e9a0-e875-49d0-84e0-ff3e46fd0c8c.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.04;
    pointer-events: none;
}

.problems__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    position: relative;
    z-index: 1;
}

.problem-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-10) var(--space-6);
    background: var(--gradient-card);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--duration-base) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--accent-primary), 
        transparent);
    opacity: 0;
    transition: all var(--duration-base) var(--ease-out-expo);
}

.problem-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 229, 255, 0.2);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg), 0 0 80px var(--accent-subtle);
}

.problem-card:hover::before {
    opacity: 1;
    left: 10%;
    right: 10%;
}

.problem-card__icon-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-micro);
    border: 1px solid var(--accent-subtle);
    border-radius: var(--radius-xl);
    transition: all var(--duration-base) var(--ease-out-expo);
}

.problem-card:hover .problem-card__icon-wrapper {
    background: var(--accent-subtle);
    border-color: var(--accent-dim);
    transform: scale(1.1);
    box-shadow: 0 0 40px var(--accent-subtle);
}

.problem-card__icon {
    color: var(--accent-primary);
    transition: all var(--duration-base) var(--ease-out-expo);
}

.problem-card:hover .problem-card__icon {
    transform: scale(1.1);
}

.problem-card__title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-wide);
    color: var(--text-white);
}

.problem-card__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ----------------------------------------
   SECTION 3: PRODUCT INFO — Showcase
   ---------------------------------------- */
.product-info {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, 
        var(--bg-secondary) 0%, 
        var(--bg-primary) 50%,
        var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.product-info::after {
    content: '';
    position: absolute;
    left: 15%;
    right: 15%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    pointer-events: none;
}

.product-info::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: var(--gradient-radial-center);
    pointer-events: none;
}

.product-info__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-12);
    position: relative;
    z-index: 1;
}

.product-info__image {
    width: 100%;
    max-width: 360px;
    position: relative;
}

.product-info__image-frame {
    position: relative;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0;
    overflow: visible;
}

.product-info__image-frame::after {
    content: '';
    position: absolute;
    inset: -8% -6%;
    background: radial-gradient(ellipse, rgba(0, 229, 255, 0.35) 0%, rgba(0, 229, 255, 0.2) 35%, transparent 70%);
    opacity: 0;
    filter: blur(35px);
    transition: opacity var(--duration-base) var(--ease-out-expo);
    z-index: 0;
    pointer-events: none;
}

.product-info__image-frame::before {
    display: none;
}

.product-info__image-frame img {
    width: 100%;
    height: auto;
    border-radius: 0;
    filter: none;
    position: relative;
    z-index: 1;
    transition: transform var(--duration-slow) var(--ease-out-expo);
}

.product-info__image-frame:hover img {
    transform: scale(1.02);
}

@media (min-width: 1024px) {
    .product-info__image-frame:hover img {
        filter: drop-shadow(var(--shadow-glow-intense));
    }

    .product-info__image-frame:hover::after {
        opacity: 1;
    }
}

.product-info__text {
    text-align: center;
    max-width: 600px;
}

.product-info__label {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-ultra);
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: var(--space-3);
}

.product-info__title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--ls-tight);
    color: var(--text-white);
    margin-bottom: var(--space-6);
    text-shadow: 0 0 60px var(--accent-subtle);
}

.product-info__description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

.product-info__format {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin-top: calc(var(--space-4) * -1);
    margin-bottom: var(--space-6);
}

.product-info__ingredients {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-10);
}

.ingredient {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    font-size: 1rem;
    color: var(--text-muted);
}

.ingredient__icon {
    color: var(--accent-primary);
    font-size: 0.75rem;
}

/* ----------------------------------------
   SECTION 4: HOW IT WORKS — Premium List
   ---------------------------------------- */
.how-it-works {
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
    position: relative;
}

.how-it-works::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.08), 
        transparent);
}

.how-it-works::after {
    content: '';
    position: absolute;
    left: 15%;
    right: 15%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.2), transparent);
    pointer-events: none;
}

.how-it-works__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.how-it-works__text {
    order: 1;
}

.how-it-works__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.how-it-works__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
    padding: var(--space-6);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-lg);
    transition: all var(--duration-base) var(--ease-out-expo);
}

.how-it-works__item:hover {
    background: var(--bg-card);
    border-color: rgba(0, 229, 255, 0.15);
    transform: translateX(10px);
}

.how-it-works__number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--ls-wide);
    transition: all var(--duration-base);
}

.how-it-works__item:hover .how-it-works__number {
    background: var(--accent-dim);
    box-shadow: 0 0 30px var(--accent-subtle);
}

.how-it-works__item-content h4 {
    font-size: 1.0625rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-white);
    margin-bottom: var(--space-1);
    transition: color var(--duration-base);
}

.how-it-works__item-content p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.how-it-works__image {
    order: 2;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
}

.how-it-works__image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--duration-slow) var(--ease-out-expo);
}

.how-it-works__image:hover img {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg), 0 0 80px var(--accent-subtle);
}

/* ----------------------------------------
   SECTION 5: SYSTEM — Dramatic Visual
   ---------------------------------------- */
.system {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, 
        var(--bg-secondary) 0%, 
        var(--bg-void) 50%,
        var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

/* ----------------------------------------
   SECTION 4.5: USAGE — How to Apply
   ---------------------------------------- */
.usage {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg,
        var(--bg-secondary) 0%,
        var(--bg-primary) 50%,
        var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

/* Верхняя декоративная линия */
.usage::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.08),
        transparent);
}

/* Нижняя акцентная линия */
.usage::after {
    content: '';
    position: absolute;
    left: 12%;
    right: 12%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.2), transparent);
    pointer-events: none;
}

/* Фоновое свечение */
.usage__glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: var(--gradient-radial-center);
    pointer-events: none;
    z-index: 0;
}

.usage .container {
    position: relative;
    z-index: 1;
}

.usage__subtitle {
    text-align: center;
    font-size: 1rem;
    color: var(--text-secondary);
    margin: calc(var(--space-6) * -1) auto var(--space-10);
    max-width: 46ch;
    opacity: 0.8;
}

.usage__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.usage-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    background: var(--gradient-card);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-base) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

/* Светящаяся линия сверху при hover */
.usage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background: linear-gradient(90deg,
        transparent,
        var(--accent-primary),
        transparent);
    opacity: 0;
    transition: all var(--duration-base) var(--ease-out-expo);
}

.usage-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 229, 255, 0.2);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg), 0 0 80px var(--accent-subtle);
}

.usage-card:hover::before {
    opacity: 1;
    left: 10%;
    right: 10%;
}

.usage-card__media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-elevated);
}

/* Градиент поверх изображения */
.usage-card__media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.5) 100%);
    pointer-events: none;
    transition: opacity var(--duration-base);
}

.usage-card__media img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    display: block;
    transition: transform var(--duration-slow) var(--ease-out-expo);
}

.usage-card:hover .usage-card__media img {
    transform: scale(1.05);
}

.usage-card__badge {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle);
    border: 1px solid rgba(0, 229, 255, 0.35);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--ls-wide);
    color: var(--accent-primary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--duration-base) var(--ease-out-expo);
    z-index: 2;
}

.usage-card:hover .usage-card__badge {
    background: var(--accent-dim);
    box-shadow: 0 0 30px var(--accent-subtle);
    transform: scale(1.1);
}

.usage-card__title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-white);
    letter-spacing: var(--ls-wide);
    transition: color var(--duration-base);
}

.usage-card:hover .usage-card__title {
    color: var(--accent-primary);
}

.usage-card__desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.usage__disclaimer {
    text-align: center;
    margin-top: var(--space-10);
    font-size: 0.8125rem;
    color: var(--text-muted);
    opacity: 0.75;
    padding: var(--space-4) var(--space-6);
    background: var(--accent-micro);
    border: 1px solid var(--accent-subtle);
    border-radius: var(--radius-full);
    display: inline-block;
    width: auto;
}

.usage .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

@media (min-width: 900px) {
    .usage__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: var(--space-8);
    }

    .usage-card {
        padding: var(--space-8);
    }
    
    .usage-card__title {
        font-size: 1.1875rem;
    }
}

.system::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse, var(--accent-micro) 0%, transparent 50%);
    pointer-events: none;
}

.system::after {
    content: '';
    position: absolute;
    left: 12%;
    right: 12%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    pointer-events: none;
}

.system__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-10);
    text-align: center;
    position: relative;
    z-index: 1;
}

.system__image {
    width: 100%;
    max-width: 340px;
    position: relative;
}

.system__image::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 180%;
    height: 180%;
    background: radial-gradient(ellipse, var(--accent-subtle) 0%, transparent 50%);
    pointer-events: none;
    animation: pulse-glow 5s ease-in-out infinite;
    opacity: 0.7;
    transition: opacity var(--duration-base) var(--ease-out-expo), filter var(--duration-base) var(--ease-out-expo);
}

.system__image img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 40px 80px rgba(0, 229, 255, 0.2));
    position: relative;
    z-index: 1;
    transition: all var(--duration-slow) var(--ease-out-expo);
}

.system__image:hover img {
    transform: scale(1.05);
    filter: drop-shadow(0 40px 80px rgba(0, 229, 255, 0.2)) drop-shadow(var(--shadow-glow-intense));
}

.system__image:hover::before {
    opacity: 1;
    filter: blur(10px);
}

.system__text-block {
    max-width: 600px;
    text-align: center;
}

.system__label {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-ultra);
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: var(--space-3);
}

.system__title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--font-weight-bold);
    color: var(--text-white);
    margin-bottom: var(--space-4);
}

.system__description {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.system__note {
    max-width: 46ch;
    margin: var(--space-3) auto;
    font-size: 0.975rem;
    color: var(--text-secondary);
    line-height: 1.6;
    opacity: 0.78;
}

.system__note--secondary {
    margin-top: var(--space-2);
}

.system__steps {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
    align-items: center;
    margin: var(--space-5) auto 0;
    max-width: 600px;
}

.system__step {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 229, 255, 0.25);
    background: rgba(0, 229, 255, 0.06);
    color: var(--text-primary);
    font-size: 0.95rem;
    letter-spacing: var(--ls-wide);
    box-shadow: 0 6px 20px rgba(0, 229, 255, 0.08);
}

@media (max-width: 767px) {
    .system__steps {
        flex-direction: column;
        align-items: stretch;
    }

    .system__step {
        text-align: center;
    }
}

/* ----------------------------------------
   SECTION 6: FOR WHOM — Elegant Cards
   ---------------------------------------- */
.for-whom {
    position: relative;
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
    overflow: hidden;
}

.for-whom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.08), 
        transparent);
}

.for-whom::after {
    content: '';
    position: absolute;
    left: 10%;
    right: 10%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.2), transparent);
    opacity: 0.6;
    pointer-events: none;
}

.for-whom__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../assets/50f4a0df-f95e-44dc-bb7c-015d2c96818d.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.03;
    pointer-events: none;
}

.for-whom__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    position: relative;
    z-index: 1;
}

.audience-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-10) var(--space-6);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--duration-base) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.audience-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--accent-primary), 
        transparent);
    opacity: 0;
    transition: all var(--duration-base);
}

.audience-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 229, 255, 0.15);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.audience-card:hover::before {
    opacity: 1;
}

.audience-card__icon-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-micro);
    border: 1px solid var(--accent-subtle);
    border-radius: var(--radius-xl);
    color: var(--accent-primary);
    transition: all var(--duration-base) var(--ease-out-expo);
}

.audience-card:hover .audience-card__icon-wrapper {
    background: var(--accent-subtle);
    transform: scale(1.1);
    box-shadow: 0 0 40px var(--accent-subtle);
}

.audience-card__title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-white);
}

.audience-card__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ----------------------------------------
   SECTION 7: LEAD FORM — Conversion Focus
   ---------------------------------------- */
.lead-form {
    padding: var(--space-24) 0 var(--space-32);
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.lead-form__bg {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 100%;
    background: var(--gradient-radial-top);
    opacity: 0.8;
    pointer-events: none;
}

.lead-form::before {
    content: '';
    position: absolute;
    left: 15%;
    right: 15%;
    top: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    pointer-events: none;
}

.lead-form__wrapper {
    max-width: 480px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    padding: var(--space-10);
    background: var(--bg-glass-strong);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.lead-form__header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.lead-form__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    color: var(--accent-primary);
    background: var(--accent-micro);
    border: 1px solid var(--accent-subtle);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.lead-form__title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--ls-tight);
    color: var(--text-white);
    margin-bottom: var(--space-2);
}

.lead-form__price {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: var(--space-2);
    margin-bottom: var(--space-3);
}

.lead-form__price strong {
    color: var(--text-white);
}

.lead-form__price span {
    color: var(--text-muted);
}

.lead-form__price .price-wrap {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.lead-form__price .price-discount {
    display: inline-flex;
    align-items: center;
    padding: 0.1rem 0.6rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--accent-primary);
    background: rgba(41, 211, 255, 0.12);
    box-shadow: 0 0 12px rgba(41, 211, 255, 0.35);
    color: var(--accent-primary);
    font-weight: var(--font-weight-semibold);
}

.lead-form__price .price-old {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration-thickness: 1px;
    text-decoration-color: rgba(255, 255, 255, 0.85);
    text-decoration-style: solid;
    text-decoration-skip-ink: none;
}

.lead-form__subtitle {
    font-size: 1rem;
    color: var(--text-muted);
}

.lead-form__expectation {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-top: var(--space-3);
}

.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form__label {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-widest);
    color: var(--text-dim);
    text-transform: uppercase;
}

.form__input-wrapper {
    position: relative;
}

.form__input-icon {
    position: absolute;
    left: var(--space-5);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-subtle);
    pointer-events: none;
    transition: color var(--duration-base);
}

.form__input {
    width: 100%;
    height: 64px;
    padding: 0 var(--space-6) 0 var(--space-12);
    font-size: 1rem;
    color: var(--text-white);
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: all var(--duration-base) var(--ease-out-expo);
}

.form__input::placeholder {
    color: var(--text-subtle);
}

.form__input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-subtle), 0 0 40px var(--accent-micro);
    background: var(--bg-elevated);
}

.form__input:focus + .form__input-icon,
.form__input-wrapper:focus-within .form__input-icon {
    color: var(--accent-primary);
}

.form__input:invalid:not(:placeholder-shown) {
    border-color: #dc2626;
}

.form__error {
    font-size: 0.75rem;
    color: #f87171;
    min-height: 1rem;
}

.form__submit {
    margin-top: var(--space-4);
    min-height: 64px;
    font-size: 1rem;
}

.form__submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.form__disclaimer {
    font-size: 0.8125rem;
    color: var(--text-dim);
    text-align: center;
    margin-top: var(--space-4);
    letter-spacing: var(--ls-wide);
}

.form__consent {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: var(--space-5);
}

.form__consent a {
    color: var(--accent-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.form__consent a:hover {
    color: var(--text-white);
}

.form__trust {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.trust-item svg {
    color: var(--accent-primary);
    opacity: 0.7;
}

/* ----------------------------------------
   FOOTER — Minimal & Compliant
   ---------------------------------------- */
.footer {
    padding: var(--space-10) 0 var(--space-12);
    background: var(--bg-void);
    border-top: 1px solid rgba(0, 229, 255, 0.12);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.35);
}

.footer__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    text-align: center;
}

.footer__brand {
    margin-bottom: var(--space-2);
}

.footer__logo {
    width: 72px;
    height: auto;
    opacity: 0.6;
    transition: opacity var(--duration-base);
}

.footer__contacts {
    gap: var(--space-1);
}

.footer__contact-item {
    gap: var(--space-1);
}

.footer__logo:hover {
    opacity: 1;
}

.footer__legal {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: rgba(255, 255, 255, 0.85);
}

.footer__contacts {
    display: grid;
    gap: var(--space-2);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer__contact-item {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
}

.footer__contact-label {
    color: var(--text-dim);
    font-weight: var(--font-weight-medium);
}

.footer__contact-value {
    color: var(--text-secondary);
}

.footer__copyright {
    font-size: 0.8125rem;
    color: var(--text-subtle);
}

/* ----------------------------------------
   STICKY CTA — Premium Mobile
   ---------------------------------------- */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-4) var(--space-5);
    background: linear-gradient(to top, 
        var(--bg-void) 60%, 
        rgba(2, 2, 4, 0.98) 85%,
        transparent);
    z-index: 100;
    transform: translateY(100%);
    transition: transform var(--duration-slow) var(--ease-out-expo);
    padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0));
}

.sticky-cta.visible {
    transform: translateY(0);
}

.sticky-cta[hidden] {
    display: none;
}

.sticky-cta .btn {
    box-shadow: var(--shadow-glow), var(--shadow-lg);
    animation: glow-pulse 2s ease-in-out infinite;
}

/* ----------------------------------------
   TABLET (min-width: 768px)
   ---------------------------------------- */
@media (min-width: 768px) {
    :root {
        --container-padding: 40px;
    }
    
    .hero__image {
        max-width: 480px;
    }
    
    .problems__grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-6);
    }
    
    .problem-card {
        padding: var(--space-12) var(--space-8);
    }
    
    .product-info__content {
        flex-direction: row;
        gap: var(--space-16);
        text-align: left;
    }
    
    .product-info__image {
        flex: 0 0 45%;
        max-width: 420px;
    }
    
    .product-info__text {
        flex: 1;
        text-align: left;
    }
    
    .product-info__ingredients {
        align-items: flex-start;
    }
    
    .ingredient {
        justify-content: flex-start;
    }
    
    .how-it-works__content {
        flex-direction: row;
        align-items: center;
        gap: var(--space-16);
    }
    
    .how-it-works__text {
        flex: 1;
        order: 1;
    }
    
    .how-it-works__image {
        flex: 0 0 45%;
        order: 2;
        max-width: none;
    }
    
    .system__content {
        flex-direction: row;
        text-align: left;
        gap: var(--space-16);
    }
    
    .system__image {
        flex: 0 0 40%;
        max-width: 380px;
    }
    
    .system__text-block {
        flex: 1;
        max-width: none;
    }
    
    .for-whom__grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-6);
    }
    
    .lead-form__wrapper {
        max-width: 540px;
        padding: var(--space-12);
    }
}

/* ----------------------------------------
   DESKTOP (min-width: 1024px)
   ---------------------------------------- */
@media (min-width: 1024px) {
    :root {
        --container-padding: 60px;
        --space-24: 160px;
    }
    
    .hero {
        padding: var(--space-24) 0 var(--space-20);
    }
    
    .hero__content {
        flex-direction: row;
        text-align: left;
        justify-content: space-between;
        gap: var(--space-20);
    }
    
    .hero__text {
        flex: 1;
        max-width: 600px;
        gap: var(--space-6);
    }
    
    .hero__badge {
        margin: 0 0 var(--space-4);
    }
    
    .hero__cta {
        align-self: flex-start;
        margin-top: var(--space-8);
    }
    
    .hero__image {
        flex: 0 0 50%;
        max-width: 600px;
        margin-right: -20px;
    }
    
    .hero__scroll-indicator {
        display: flex;
    }
    
    .problem-card {
        padding: var(--space-12) var(--space-10);
    }
    
    .product-info__image {
        max-width: 480px;
    }
    
    .system__image {
        max-width: 420px;
    }
    
    .lead-form__wrapper {
        max-width: 560px;
        padding: var(--space-16);
    }
    
    /* Hide sticky CTA on desktop */
    .sticky-cta {
        display: none !important;
    }
}

/* ----------------------------------------
   LARGE DESKTOP (min-width: 1280px)
   ---------------------------------------- */
@media (min-width: 1280px) {
    .hero__image {
        max-width: 700px;
    }
    
    .product-info__image {
        max-width: 520px;
    }
}

/* ----------------------------------------
   STICKY HEADER — Glass Navigation
   ---------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    background: transparent;
    transition: all var(--duration-base) var(--ease-out-expo);
    transform: translateY(0);
}

.header.scrolled {
    background: rgba(2, 2, 4, 0.82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--accent-micro);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header--solid {
    background: rgba(2, 2, 4, 0.82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--accent-micro);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header.hidden {
    transform: translateY(-100%);
}

.header__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: opacity var(--duration-fast) var(--ease-out-expo);
}

.header__logo:hover {
    opacity: 0.8;
}

.header__logo img {
    width: 108px;
    height: auto;
    object-fit: contain;
}

.header__brand {
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--ls-wider);
    color: var(--text-white);
    text-transform: uppercase;
}

.header__cta {
    flex-shrink: 0;
    opacity: 0.85;
}

.header__cta:hover {
    opacity: 1;
}

.btn--sm {
    padding: var(--space-3) var(--space-6);
    font-size: 0.75rem;
    min-height: 44px;
    letter-spacing: var(--ls-widest);
}

/* ----------------------------------------
   BACK TO TOP BUTTON
   ---------------------------------------- */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 20px;
    z-index: 999;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--accent-subtle);
    border-radius: var(--radius-full);
    color: var(--accent-primary);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--duration-base) var(--ease-out-expo);
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.back-to-top:hover {
    background: var(--accent-subtle);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    transition: transform var(--duration-fast) var(--ease-out-expo);
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

/* ----------------------------------------
   SCROLL ANIMATIONS
   ---------------------------------------- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity var(--duration-slower) var(--ease-out-expo),
                transform var(--duration-slower) var(--ease-out-expo);
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animations for children */
.animate-on-scroll.is-visible .problem-card:nth-child(1),
.animate-on-scroll.is-visible .benefit__item:nth-child(1),
.animate-on-scroll.is-visible .audience__item:nth-child(1) {
    transition-delay: 0.1s;
}

.animate-on-scroll.is-visible .problem-card:nth-child(2),
.animate-on-scroll.is-visible .benefit__item:nth-child(2),
.animate-on-scroll.is-visible .audience__item:nth-child(2) {
    transition-delay: 0.2s;
}

.animate-on-scroll.is-visible .problem-card:nth-child(3),
.animate-on-scroll.is-visible .benefit__item:nth-child(3),
.animate-on-scroll.is-visible .audience__item:nth-child(3) {
    transition-delay: 0.3s;
}

.animate-on-scroll.is-visible .benefit__item:nth-child(4) {
    transition-delay: 0.4s;
}

/* ----------------------------------------
   PARALLAX BACKGROUNDS
   ---------------------------------------- */
.parallax-bg {
    will-change: transform;
    transition: transform 0.1s linear;
}

/* Adjust body padding for fixed header */
body {
    padding-top: 0;
}

/* Mobile sticky CTA adjustment */
@media (max-width: 767px) {
    .back-to-top {
        bottom: 140px;
        right: 16px;
        width: 48px;
        height: 48px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
    
    .header {
        padding: var(--space-3) 0;
    }
    
    .btn--sm {
        padding: var(--space-2) var(--space-4);
        font-size: 0.6875rem;
        min-height: 40px;
    }
    
    .header__logo-text {
        font-size: 1rem;
    }
}

/* Desktop header enhancements */
@media (min-width: 1024px) {
    .header {
        padding: var(--space-5) 0;
    }

    .header__logo img {
        width: 162px;
    }
    
    .back-to-top {
        bottom: 40px;
        right: 40px;
        width: 56px;
        height: 56px;
    }
}

/* ----------------------------------------
   REDUCED MOTION
   ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .hero__product {
        animation: none;
    }
}

/* ----------------------------------------
   PRINT
   ---------------------------------------- */
@media print {
    .sticky-cta,
    .hero__cta,
    .form__submit {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero__ambient,
    .hero::after,
    .problems__bg,
    .for-whom__bg,
    .lead-form__bg {
        display: none;
    }
}


/* ====== Lead form steps (Google Ads checklist) ====== */
.lead-form__steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px;margin-bottom:10px}
.lead-form__step{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid rgba(255,255,255,.12);border-radius:14px;background:rgba(255,255,255,.04)}
.lead-form__step-num{width:26px;height:26px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;background:rgba(0,212,255,.16);color:var(--text-white)}
.lead-form__step-text{color:var(--text-secondary);font-size:.95rem;line-height:1.25}
.lead-form__note{color:var(--text-muted);font-size:.875rem;margin-top:6px}
@media (max-width: 520px){.lead-form__steps{grid-template-columns:1fr}}


/* ----------------------------------------
   LANGUAGE SWITCH — Header Segmented Control
   ---------------------------------------- */
.header__actions{
    display:flex;
    align-items:center;
    gap: var(--space-4);
}

.lang-switch{
    display:flex;
    align-items:center;
    gap: 2px;
    padding: 4px;
    border-radius: 999px;
    border: 1px solid var(--accent-micro);
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 0 18px rgba(0,0,0,0.35);
}

.lang-switch__link{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    height: 36px;
    min-width: 44px;
    padding: 0 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    color: var(--text-muted);
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.lang-switch__link:hover{
    color: var(--text-white);
    background: rgba(255,255,255,0.06);
}

.lang-switch__link.is-active{
    color: var(--bg-void);
    background: var(--accent-primary);
    box-shadow: 0 0 18px var(--accent-subtle);
}