/**
 * Magic Mirror Works - Main Stylesheet
 * A minimalistic, modern website for an AI mobile app company
 *
 * Table of Contents:
 * 1. CSS Custom Properties (Variables)
 * 2. Reset & Base Styles
 * 3. Typography
 * 4. Layout & Container
 * 5. Header & Navigation
 * 6. Hero Section
 * 7. About Section
 * 8. Products Section
 * 9. Technology Section
 * 10. Contact Section
 * 11. Footer
 * 12. Modal
 * 13. Form Styles
 * 14. Buttons
 * 15. Animations & Keyframes
 * 16. Utilities
 * 17. Dark Mode
 * 18. Responsive Breakpoints
 * 19. Accessibility & Reduced Motion
 */

/* ==========================================================================
   1. CSS Custom Properties (Variables)
   ========================================================================== */

:root {
    /* Colors */
    --primary-color: #2D3561;
    --primary-light: #3d4778;
    --primary-dark: #1e2442;
    --accent-color: #6C63FF;
    --accent-light: #8b84ff;
    --accent-dark: #5248e6;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-gradient-hover: linear-gradient(135deg, #5a72d4 0%, #6a4290 100%);

    /* Background Colors */
    --bg-color: #FFFFFF;
    --bg-secondary: #F7F9FC;
    --bg-tertiary: #EEF2F7;

    /* Text Colors */
    --text-primary: #2C3E50;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --text-inverse: #FFFFFF;

    /* Border & Shadow */
    --border-color: #E5E7EB;
    --border-light: #F3F4F6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 6px 12px -2px rgba(0, 0, 0, 0.1), 0 3px 7px -3px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-size-6xl: 3.75rem;   /* 60px */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing (8px base) */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */

    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-index layers */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;

    /* Container widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1400px;

    /* Header height */
    --header-height: 72px;
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

body.modal-open {
    overflow: hidden;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

input,
button,
textarea,
select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

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

ul,
ol {
    list-style: none;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    color: var(--text-secondary);
}

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

/* ==========================================================================
   4. Layout & Container
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-16);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
}

.section-desc {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    z-index: var(--z-fixed);
    transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
}

.logo-icon {
    flex-shrink: 0;
}

.logo-text {
    display: none;
}

@media (min-width: 480px) {
    .logo-text {
        display: block;
    }
}

.nav-menu {
    display: none;
    align-items: center;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
}

.nav-link {
    position: relative;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: block;
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-left: var(--space-2);
    border-radius: var(--radius-lg);
    transition: background var(--transition-fast);
}

.nav-toggle:hover {
    background: var(--bg-secondary);
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
}

.hamburger {
    position: relative;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: transform var(--transition-normal);
}

.hamburger::before {
    top: -6px;
}

.hamburger::after {
    top: 6px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-6);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: var(--z-dropdown);
}

.mobile-menu[aria-hidden="false"] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

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

.mobile-nav-link {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover {
    background: var(--bg-secondary);
    color: var(--accent-color);
}

/* Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent-gradient);
    width: 0%;
    z-index: calc(var(--z-fixed) + 1);
    transition: width 50ms linear;
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(var(--header-height) + var(--space-16)) var(--space-6) var(--space-16);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.gradient-orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.4) 0%, rgba(118, 75, 162, 0.2) 100%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.gradient-orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, rgba(118, 75, 162, 0.3) 0%, rgba(102, 126, 234, 0.15) 100%);
    bottom: -100px;
    left: -100px;
    animation-delay: -7s;
}

.gradient-orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2) 0%, rgba(102, 126, 234, 0.1) 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 1;
}

.hero-badge {
    margin-bottom: var(--space-6);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--accent-color);
    background: rgba(108, 99, 255, 0.1);
    border: 1px solid rgba(108, 99, 255, 0.2);
    border-radius: var(--radius-full);
}

.hero-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-6xl));
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: clamp(var(--font-size-base), 2vw, var(--font-size-xl));
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-10);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-muted);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    justify-content: center;
    padding-top: var(--space-2);
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: var(--radius-full);
    animation: scroll-wheel 2s ease-in-out infinite;
}

.scroll-text {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

/* ==========================================================================
   7. About Section
   ========================================================================== */

.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
    align-items: center;
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-16);
    }
}

.about-lead {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    line-height: var(--line-height-relaxed);
}

.about-text {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-10);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.value-item {
    padding: var(--space-4);
}

.value-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    color: var(--accent-color);
    box-shadow: var(--shadow-sm);
}

.value-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.value-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* About Visual / Flow */
.about-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    background: var(--bg-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-lg);
}

.visual-flow {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
}

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

.flow-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.flow-icon:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.mobile-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.ai-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.delight-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.flow-step span {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.flow-arrow {
    color: var(--text-muted);
    display: none;
}

@media (min-width: 640px) {
    .flow-arrow {
        display: block;
    }
}

/* ==========================================================================
   8. Products Section
   ========================================================================== */

.products {
    background: var(--bg-color);
}

/* Featured Product Card */
.product-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.product-card:hover {
    box-shadow: var(--shadow-xl);
}

.product-card.featured {
    display: grid;
    grid-template-columns: 1fr;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
}

.product-card.featured::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-2xl);
    padding: 2px;
    background: var(--accent-gradient);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

@media (min-width: 1024px) {
    .product-card.featured {
        grid-template-columns: 1fr 400px;
    }
}

.product-content {
    padding: var(--space-10);
}

.product-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.product-icon {
    flex-shrink: 0;
}

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

.product-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.product-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--accent-color);
    background: rgba(108, 99, 255, 0.1);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

.product-tagline {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.product-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.product-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
    .product-features {
        grid-template-columns: repeat(2, 1fr);
    }
}

.product-features li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.product-features svg {
    flex-shrink: 0;
    color: var(--accent-color);
}

.product-platforms {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.platform-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.platform-icons {
    display: flex;
    gap: var(--space-3);
}

.platform {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.product-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.product-cta .chevron {
    transition: transform var(--transition-fast);
}

.product-cta button[aria-expanded="true"] .chevron {
    transform: rotate(180deg);
}

/* Product Details (Expandable) */
.product-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.product-details[aria-hidden="false"] {
    max-height: 600px;
}

.details-content {
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-6);
}

.details-content h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-4);
}

.details-steps {
    counter-reset: step;
}

.details-steps li {
    position: relative;
    padding-left: var(--space-10);
    margin-bottom: var(--space-6);
}

.details-steps li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: white;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

.details-steps strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.details-steps p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Product Visual / Phone Mockup */
.product-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-10);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.phone-mockup {
    perspective: 1000px;
}

.phone-frame {
    width: 240px;
    height: 480px;
    background: #1a1a1a;
    border-radius: 36px;
    padding: 12px;
    box-shadow: var(--shadow-xl), 0 0 0 2px rgba(255, 255, 255, 0.1) inset;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-normal);
}

.phone-mockup:hover .phone-frame {
    transform: rotateY(0) rotateX(0);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    border-radius: 28px;
    overflow: hidden;
}

.app-preview {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.preview-header {
    padding: var(--space-4);
    text-align: center;
    background: var(--accent-gradient);
    color: white;
}

.preview-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.preview-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
}

.preview-illustration {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
}

.preview-illustration svg {
    width: 100%;
    border-radius: var(--radius-lg);
}

.preview-text {
    text-align: center;
}

.preview-text p {
    font-size: var(--font-size-sm);
    font-style: italic;
    color: var(--text-secondary);
}

/* Future Products */
.future-products {
    margin-top: var(--space-10);
}

.future-card {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    text-align: center;
    transition: border-color var(--transition-normal);
}

.future-card:hover {
    border-color: var(--accent-color);
}

.future-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-4);
    color: var(--text-muted);
}

.future-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-2);
}

.future-desc {
    color: var(--text-secondary);
}

/* ==========================================================================
   9. Technology Section
   ========================================================================== */

.technology {
    background: var(--bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

@media (min-width: 640px) {
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .tech-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-6);
    background: var(--bg-color);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.tech-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.tech-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-3);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.tech-item:hover .tech-icon {
    color: var(--accent-color);
}

.tech-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.tech-category {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ==========================================================================
   10. Contact Section
   ========================================================================== */

.contact {
    background: var(--bg-color);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
}

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-16);
    }
}

.contact-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
}

.contact-heading {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    color: var(--accent-color);
    flex-shrink: 0;
}

.contact-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.contact-link {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--accent-color);
}

/* Simplified Contact Section */
.contact-simple {
    display: flex;
    justify-content: center;
    padding: var(--space-8) 0;
}

.contact-item-centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-4);
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    max-width: 400px;
}

.contact-item-centered .contact-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-gradient);
    color: white;
}

.contact-item-centered .contact-text {
    align-items: center;
}

.contact-link-large {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
    transition: color var(--transition-fast);
}

.contact-link-large:hover {
    color: var(--accent-color);
}

@media (max-width: 480px) {
    .contact-link-large {
        font-size: var(--font-size-base);
    }
}

.contact-social {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-color);
}

.social-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-4);
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px);
}

/* ==========================================================================
   11. Footer
   ========================================================================== */

.footer {
    background: var(--primary-color);
    color: var(--text-inverse);
    padding: var(--space-12) 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

@media (min-width: 768px) {
    .footer-brand {
        align-items: flex-start;
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: var(--font-weight-semibold);
    color: white;
    transition: opacity var(--transition-fast);
}

.footer-logo:hover {
    opacity: 0.8;
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-6);
}

.footer-link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: white;
}

.footer-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

@media (min-width: 768px) {
    .footer-info {
        align-items: flex-end;
    }
}

.footer-location {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   12. Modal
   ========================================================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: var(--z-modal-backdrop);
}

.modal-overlay[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: relative;
    width: 100%;
    max-width: 440px;
    background: var(--bg-color);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-normal);
    z-index: var(--z-modal);
}

.modal-overlay[aria-hidden="false"] .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-content {
    padding: var(--space-10);
    text-align: center;
}

.modal-icon {
    display: inline-flex;
    margin-bottom: var(--space-4);
}

.modal-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-2);
}

.modal-desc {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.modal-privacy {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--space-4);
}

/* ==========================================================================
   13. Form Styles
   ========================================================================== */

.contact-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: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.form-label .required {
    color: #ef4444;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:hover,
.form-textarea:hover {
    border-color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input.error,
.form-textarea.error {
    border-color: #ef4444;
}

.form-input.error:focus,
.form-textarea.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    font-size: var(--font-size-sm);
    color: #ef4444;
    min-height: 20px;
}

.form-success {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--radius-lg);
    color: #16a34a;
    margin-top: var(--space-4);
}

.form-success.show {
    display: flex;
}

.form-success p {
    color: inherit;
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   14. Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    color: white;
    background: var(--accent-gradient);
    box-shadow: 0 4px 14px 0 rgba(108, 99, 255, 0.4);
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    box-shadow: 0 6px 20px 0 rgba(108, 99, 255, 0.5);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    color: var(--text-primary);
    background: var(--bg-color);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    background: var(--bg-secondary);
}

.btn-ghost {
    color: var(--text-secondary);
    background: transparent;
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.btn-full {
    width: 100%;
}

/* Button Loading State */
.btn .btn-loading,
.btn .btn-success {
    display: none;
    align-items: center;
    gap: var(--space-2);
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .btn-loading {
    display: flex;
}

.btn.success .btn-text {
    display: none;
}

.btn.success .btn-loading {
    display: none;
}

.btn.success .btn-success {
    display: flex;
}

.btn:disabled,
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

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

/* ==========================================================================
   15. Animations & Keyframes
   ========================================================================== */

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    25% {
        transform: translateY(-20px) translateX(10px);
    }
    50% {
        transform: translateY(0) translateX(20px);
    }
    75% {
        transform: translateY(20px) translateX(10px);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-8px);
    }
}

@keyframes scroll-wheel {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(8px);
    }
}

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

@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in-down {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scale-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fade-in 0.6s ease forwards;
    opacity: 0;
}

.animate-fade-in-up {
    animation: fade-in-up 0.6s ease forwards;
    opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* Scroll Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ==========================================================================
   16. Utilities
   ========================================================================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ==========================================================================
   17. Dark Mode
   ========================================================================== */

[data-theme="dark"] {
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --border-light: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 12px -2px rgba(0, 0, 0, 0.4), 0 3px 7px -3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .header {
    background: rgba(15, 23, 42, 0.9);
    border-bottom-color: var(--border-light);
}

[data-theme="dark"] .header.scrolled {
    background: rgba(15, 23, 42, 0.98);
}

[data-theme="dark"] .mobile-menu {
    background: var(--bg-color);
}

[data-theme="dark"] .hamburger,
[data-theme="dark"] .hamburger::before,
[data-theme="dark"] .hamburger::after {
    background: var(--text-primary);
}

[data-theme="dark"] .nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

[data-theme="dark"] .gradient-orb {
    opacity: 0.3;
}

[data-theme="dark"] .phone-frame {
    background: #000;
}

[data-theme="dark"] .phone-screen {
    background: var(--bg-secondary);
}

[data-theme="dark"] .footer {
    background: #020617;
}

[data-theme="dark"] .product-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

[data-theme="dark"] .product-visual {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
}

/* ==========================================================================
   18. Responsive Breakpoints
   ========================================================================== */

/* Mobile - 320px to 767px */
@media (max-width: 767px) {
    :root {
        --header-height: 64px;
    }

    .section {
        padding: var(--space-16) 0;
    }

    .section-header {
        margin-bottom: var(--space-10);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .hero {
        padding-top: calc(var(--header-height) + var(--space-12));
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .values-grid {
        grid-template-columns: 1fr;
    }

    .visual-card {
        padding: var(--space-6);
    }

    .flow-icon {
        width: 60px;
        height: 60px;
    }

    .product-content {
        padding: var(--space-6);
    }

    .product-visual {
        padding: var(--space-6);
    }

    .phone-frame {
        width: 200px;
        height: 400px;
    }

    .contact-card {
        padding: var(--space-6);
    }

    .modal-content {
        padding: var(--space-6);
    }
}

/* Tablet - 768px to 1023px */
@media (min-width: 768px) and (max-width: 1023px) {
    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large Desktop - 1440px+ */
@media (min-width: 1440px) {
    .container {
        max-width: var(--container-2xl);
    }

    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

/* ==========================================================================
   19. Accessibility & Reduced Motion
   ========================================================================== */

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--accent-color);
    color: white;
    padding: var(--space-3) var(--space-6);
    z-index: 9999;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .gradient-orb {
        animation: none;
    }

    .scroll-indicator {
        animation: none;
    }

    .scroll-wheel {
        animation: none;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: currentColor;
        --text-secondary: var(--text-primary);
    }

    .btn-primary {
        background: var(--text-primary);
        color: var(--bg-color);
    }
}

/* Print styles */
@media print {
    .header,
    .scroll-progress,
    .scroll-indicator,
    .modal-overlay,
    .nav-toggle,
    .theme-toggle {
        display: none !important;
    }

    .hero {
        min-height: auto;
        padding: var(--space-8) 0;
    }

    .section {
        padding: var(--space-8) 0;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    a {
        text-decoration: underline;
    }

    .gradient-text {
        -webkit-text-fill-color: var(--primary-color);
        color: var(--primary-color);
    }
}