/* ===================================
   Sudowave Landing Page Styles
   Design System: Based on Sudowave App
   Primary Color: #5B6CF6 (Satin Blue)
   =================================== */

/* === CSS Variables === */
:root {
    /* Colors from design system */
    --color-satin: #5B6CF6;
    --color-satin-dark: #4855D8;
    --color-slate-50: #F8FAFC;
    --color-slate-100: #F1F5F9;
    --color-slate-200: #E2E8F0;
    --color-slate-300: #CBD5E1;
    --color-slate-400: #94A3B8;
    --color-slate-500: #64748B;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1E293B;
    --color-slate-900: #0F172A;
    --color-white: #FFFFFF;

    /* Accent colors (no gradients) */
    --color-accent-brain: #667EEA;
    --color-accent-pattern: #F5576C;
    --color-accent-speed: #00F2FE;
    --color-accent-executive: #38F9D7;
    --color-accent-attention: #FA709A;

    /* Mode colors */
    --mode-classic: #5B6CF6;
    --mode-duel: #EF4444;
    --mode-blitz: #F59E0B;
    --mode-rush: #10B981;
    --mode-daily: #8B5CF6;

    /* Spacing (matching design tokens) */
    --spacing-xs: 0.375rem;    /* 6px */
    --spacing-sm: 0.5rem;      /* 8px */
    --spacing-md: 0.75rem;     /* 12px */
    --spacing-lg: 1rem;        /* 16px */
    --spacing-xl: 1.5rem;      /* 24px */
    --spacing-2xl: 2rem;       /* 32px */
    --spacing-3xl: 3rem;       /* 48px */
    --spacing-4xl: 4rem;       /* 64px */
    --spacing-5xl: 6rem;       /* 96px */

    /* Border radius (matching design tokens) */
    --radius-sm: 0.5rem;       /* 8px - small elements */
    --radius-md: 0.75rem;      /* 12px - buttons */
    --radius-lg: 1rem;         /* 16px - cards */
    --radius-xl: 1.5rem;       /* 24px - large cards */

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Shadows - removed per design system */

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    /* Prevent horizontal scroll on mobile */
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-slate-900);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Prevent horizontal scroll on mobile */
    overflow-x: hidden;
    /* Better text rendering on mobile */
    text-rendering: optimizeLegibility;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-slate-900);
}

/* Mobile-first typography with fluid scaling */
h1 {
    font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
}
h2 {
    font-size: clamp(1.75rem, 4vw + 0.75rem, 2.5rem);
}
h3 {
    font-size: clamp(1.25rem, 3vw + 0.5rem, 1.875rem);
}
h4 {
    font-size: clamp(1.125rem, 2vw + 0.5rem, 1.25rem);
}

/* === Container === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    /* Fluid padding with clamp for smooth scaling */
    padding: 0 clamp(1rem, 4vw, 1.5rem);
}

/* === Navigation === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-slate-200);
    padding: var(--spacing-lg) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    display: block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-slate-900);
}

@media (max-width: 640px) {
    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .logo-text {
        font-size: 1.25rem;
    }
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-base);
    white-space: nowrap;
    /* Touch-friendly minimum size */
    min-height: 44px;
    /* Prevent text selection on double-tap */
    -webkit-user-select: none;
    user-select: none;
    /* Remove tap highlight on mobile */
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: var(--color-satin);
    color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-xl);
}

.btn-primary:hover {
    background: var(--color-satin-dark);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    background: var(--color-satin-dark);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.google-play-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1); /* Make SVG white */
}

.google-play-badge {
    /* Fluid height: 48px mobile → 64px desktop */
    height: clamp(48px, 8vw, 64px);
    width: auto;
    display: block;
}

/* Mobile button optimizations */
@media (max-width: 640px) {
    .btn-large {
        font-size: 1rem;
        padding: var(--spacing-md) var(--spacing-xl);
        width: 100%;
        max-width: 100%;
    }

    .btn-small {
        font-size: 0.8125rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }
}

/* === Sections === */
.section {
    /* Fluid section padding: 3rem mobile → 6rem desktop */
    padding: clamp(3rem, 8vw, 6rem) 0;
}

.section.bg-slate {
    background: var(--color-slate-50);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
    color: var(--color-slate-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.section-text {
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.125rem);
    line-height: 1.75;
    color: var(--color-slate-600);
    margin-bottom: var(--spacing-xl);
}

/* === Hero Section === */
.hero {
    /* Mobile-first: less padding on small screens, more on larger */
    padding-top: calc(clamp(2rem, 6vw, 4rem) + 60px);
    padding-bottom: clamp(3rem, 8vw, 6rem);
    /* Auto height on mobile, min-height on desktop */
    min-height: auto;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    /* Mobile-first: single column, two columns on larger screens */
    grid-template-columns: 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

/* Desktop layout */
@media (min-width: 1025px) {
    .hero {
        min-height: 90vh;
    }

    .hero .container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    max-width: 600px;
    /* Center text on mobile, left-align on desktop */
    text-align: center;
}

@media (min-width: 1025px) {
    .hero-content {
        text-align: left;
    }
}

.hero-title {
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
    line-height: 1.1;
}

.highlight-text {
    color: var(--color-satin);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
    color: var(--color-slate-600);
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
    line-height: 1.6;
}

.hero-cta {
    margin-bottom: clamp(2rem, 5vw, 3rem);
    display: flex;
    justify-content: center;
}

@media (min-width: 1025px) {
    .hero-cta {
        justify-content: flex-start;
    }
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-slate-900);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-slate-600);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-slate-300);
}

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

.phone-mockup {
    position: relative;
    width: 100%;
    /* Fluid max-width: 280px mobile → 400px desktop */
    max-width: clamp(280px, 60vw, 400px);
    aspect-ratio: 9 / 19;
    background: var(--color-slate-900);
    border-radius: clamp(1.5rem, 4vw, 2.5rem);
    padding: clamp(0.5rem, 2vw, 0.75rem);
    margin: 0 auto;
    /* box-shadow removed per design system */
}

.phone-screen {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: clamp(1.25rem, 3.5vw, 2rem);
    background: var(--color-slate-100);
}

/* === Decorative Background Dots === */
.decoration-dots {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.hero-visual {
    position: relative;
}

.phone-mockup {
    position: relative;
    z-index: 1;
}

.dot {
    position: absolute;
    border-radius: 50%;
    background: var(--color-satin);
    opacity: 0.15;
    animation: float 8s ease-in-out infinite;
}

/* Floating animation for decorative dots */
@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    25% {
        transform: translateY(-10px) translateX(5px);
    }
    50% {
        transform: translateY(-5px) translateX(-5px);
    }
    75% {
        transform: translateY(5px) translateX(5px);
    }
}

/* Dot sizes and positions with staggered animations */
.dot-1 {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
    animation-duration: 6s;
}

.dot-2 {
    width: 60px;
    height: 60px;
    top: 15%;
    right: 10%;
    background: var(--color-accent-pattern);
    animation-delay: 1s;
    animation-duration: 7s;
}

.dot-3 {
    width: 40px;
    height: 40px;
    top: 45%;
    left: 8%;
    background: var(--color-accent-speed);
    animation-delay: 2s;
    animation-duration: 8s;
}

.dot-4 {
    width: 50px;
    height: 50px;
    top: 55%;
    right: 15%;
    background: var(--color-accent-executive);
    animation-delay: 0.5s;
    animation-duration: 7.5s;
}

.dot-5 {
    width: 70px;
    height: 70px;
    bottom: 15%;
    left: 10%;
    background: var(--color-accent-attention);
    animation-delay: 1.5s;
    animation-duration: 6.5s;
}

.dot-6 {
    width: 45px;
    height: 45px;
    bottom: 20%;
    right: 8%;
    animation-delay: 2.5s;
    animation-duration: 8.5s;
}

.dot-7 {
    width: 35px;
    height: 35px;
    top: 30%;
    right: 5%;
    background: var(--color-accent-pattern);
    animation-delay: 0.8s;
    animation-duration: 7.2s;
}

.dot-8 {
    width: 55px;
    height: 55px;
    bottom: 40%;
    left: 3%;
    background: var(--color-accent-speed);
    animation-delay: 1.8s;
    animation-duration: 6.8s;
}

@media (max-width: 640px) {
    /* Smaller dots on mobile */
    .dot-1 { width: 50px; height: 50px; }
    .dot-2 { width: 40px; height: 40px; }
    .dot-3 { width: 30px; height: 30px; }
    .dot-4 { width: 35px; height: 35px; }
    .dot-5 { width: 45px; height: 45px; }
    .dot-6 { width: 30px; height: 30px; }
    .dot-7 { width: 25px; height: 25px; }
    .dot-8 { width: 40px; height: 40px; }
}

/* === Decorative Squares === */
.decoration-squares {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.square {
    position: absolute;
    border-radius: 20px;
    background: var(--color-satin);
    opacity: 0.12;
    animation: float 8s ease-in-out infinite;
}

.square-1 {
    width: 100px;
    height: 100px;
    top: 8%;
    left: 3%;
    animation-delay: 0s;
    animation-duration: 7s;
    transform: rotate(15deg);
}

.square-2 {
    width: 70px;
    height: 70px;
    top: 20%;
    right: 8%;
    background: var(--color-accent-pattern);
    animation-delay: 1.2s;
    animation-duration: 8s;
    transform: rotate(-12deg);
}

.square-3 {
    width: 55px;
    height: 55px;
    top: 55%;
    left: 5%;
    background: var(--color-accent-speed);
    animation-delay: 2.1s;
    animation-duration: 7.5s;
    transform: rotate(25deg);
}

.square-4 {
    width: 85px;
    height: 85px;
    bottom: 12%;
    right: 10%;
    background: var(--color-accent-executive);
    animation-delay: 0.8s;
    animation-duration: 8.5s;
    transform: rotate(-20deg);
}

.square-5 {
    width: 60px;
    height: 60px;
    bottom: 30%;
    left: 8%;
    background: var(--color-accent-attention);
    animation-delay: 1.8s;
    animation-duration: 6.8s;
    transform: rotate(10deg);
}

@media (max-width: 640px) {
    .square-1 { width: 60px; height: 60px; }
    .square-2 { width: 45px; height: 45px; }
    .square-3 { width: 35px; height: 35px; }
    .square-4 { width: 55px; height: 55px; }
    .square-5 { width: 40px; height: 40px; }
}

/* === Decorative Triangles === */
.decoration-triangles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.triangle {
    position: absolute;
    opacity: 0.12;
    animation: float 8s ease-in-out infinite;
}

.triangle::before {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
}

.triangle-1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
    animation-duration: 7.2s;
    transform: rotate(20deg);
}

.triangle-1::before {
    border-width: 0 50px 87px 50px;
    border-color: transparent transparent var(--color-satin) transparent;
    border-radius: 15px;
}

.triangle-2 {
    top: 18%;
    right: 8%;
    animation-delay: 1.5s;
    animation-duration: 8.2s;
    transform: rotate(-15deg);
}

.triangle-2::before {
    border-width: 0 35px 61px 35px;
    border-color: transparent transparent var(--color-accent-pattern) transparent;
    border-radius: 12px;
}

.triangle-3 {
    bottom: 20%;
    left: 8%;
    animation-delay: 2.3s;
    animation-duration: 6.8s;
    transform: rotate(35deg);
}

.triangle-3::before {
    border-width: 0 40px 69px 40px;
    border-color: transparent transparent var(--color-accent-speed) transparent;
    border-radius: 14px;
}

.triangle-4 {
    bottom: 15%;
    right: 10%;
    animation-delay: 0.9s;
    animation-duration: 7.8s;
    transform: rotate(-25deg);
}

.triangle-4::before {
    border-width: 0 45px 78px 45px;
    border-color: transparent transparent var(--color-accent-executive) transparent;
    border-radius: 16px;
}

@media (max-width: 640px) {
    .triangle-1::before { border-width: 0 30px 52px 30px; }
    .triangle-2::before { border-width: 0 22px 38px 22px; }
    .triangle-3::before { border-width: 0 25px 43px 25px; }
    .triangle-4::before { border-width: 0 28px 48px 28px; }
}

/* === Features Grid === */
.features-grid {
    display: grid;
    /* Mobile-first: single column, auto-fit on larger screens */
    grid-template-columns: 1fr;
    gap: clamp(1rem, 3vw, 2rem);
}

@media (min-width: 641px) {
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

.feature-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    /* Fluid padding: 1.5rem mobile → 2rem desktop */
    padding: clamp(1.5rem, 4vw, 2rem);
    border: 2px solid var(--color-slate-200);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-satin);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-icon.brain { background: rgba(91, 108, 246, 0.1); }
.feature-icon.brain svg { stroke: var(--color-satin); }

.feature-icon.pattern { background: rgba(245, 87, 108, 0.1); }
.feature-icon.pattern svg { stroke: #F5576C; }

.feature-icon.speed { background: rgba(0, 242, 254, 0.1); }
.feature-icon.speed svg { stroke: #00F2FE; }

.feature-icon.executive { background: rgba(56, 249, 215, 0.1); }
.feature-icon.executive svg { stroke: #38F9D7; }

.feature-icon.attention { background: rgba(250, 112, 154, 0.1); }
.feature-icon.attention svg { stroke: #FA709A; }

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-slate-900);
}

.feature-description {
    color: var(--color-slate-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.feature-stat {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-slate-200);
}

.feature-stat-value {
    font-weight: 700;
    color: var(--color-satin);
}

/* === Game Modes === */
.modes-grid {
    display: grid;
    /* Mobile-first: single column, auto-fit on larger screens */
    grid-template-columns: 1fr;
    gap: clamp(1rem, 3vw, 1.5rem);
}

@media (min-width: 641px) {
    .modes-grid {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    }
}

.mode-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    /* Fluid padding: 1.5rem mobile → 2rem desktop */
    padding: clamp(1.5rem, 4vw, 2rem);
    border: 2px solid var(--color-slate-200);
    transition: all var(--transition-base);
    /* Touch-friendly interaction */
    -webkit-tap-highlight-color: transparent;
}

/* Hover effects only on devices with hover capability */
@media (hover: hover) {
    .mode-card:hover {
        transform: translateY(-4px);
    }
}

/* Touch devices: use active state */
@media (hover: none) {
    .mode-card:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
}

.mode-card.classic:hover { border-color: var(--mode-classic); }
.mode-card.duel:hover { border-color: var(--mode-duel); }
.mode-card.blitz:hover { border-color: var(--mode-blitz); }
.mode-card.rush:hover { border-color: var(--mode-rush); }
.mode-card.daily:hover { border-color: var(--mode-daily); }

.mode-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.mode-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mode-card.classic .mode-icon { background: rgba(91, 108, 246, 0.1); }
.mode-card.classic .mode-icon svg { stroke: var(--mode-classic); }

.mode-card.duel .mode-icon { background: rgba(239, 68, 68, 0.1); }
.mode-card.duel .mode-icon svg { stroke: var(--mode-duel); }

.mode-card.blitz .mode-icon { background: rgba(245, 158, 11, 0.1); }
.mode-card.blitz .mode-icon svg { stroke: var(--mode-blitz); }

.mode-card.rush .mode-icon { background: rgba(16, 185, 129, 0.1); }
.mode-card.rush .mode-icon svg { stroke: var(--mode-rush); }

.mode-card.daily .mode-icon { background: rgba(139, 92, 246, 0.1); }
.mode-card.daily .mode-icon svg { stroke: var(--mode-daily); }

.mode-icon svg {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}

.mode-title {
    font-size: clamp(1.25rem, 2.5vw + 0.5rem, 1.5rem);
    color: var(--color-slate-900);
}

.mode-description {
    color: var(--color-slate-600);
    line-height: 1.6;
    font-size: clamp(0.9375rem, 1.5vw + 0.5rem, 1rem);
}

/* === Two Column Layout === */
.two-column {
    display: grid;
    /* Mobile-first: single column, two columns on desktop */
    grid-template-columns: 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

@media (min-width: 1025px) {
    .two-column {
        grid-template-columns: 1fr 1fr;
    }

    .two-column.reverse {
        direction: rtl;
    }

    .two-column.reverse > * {
        direction: ltr;
    }
}

.column-content {
    max-width: 540px;
}

.benefits-list {
    list-style: none;
    margin-top: var(--spacing-2xl);
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.benefit-icon {
    width: 24px;
    height: 24px;
    stroke: var(--color-satin);
    flex-shrink: 0;
    margin-top: 2px;
}

.benefit-item span {
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.125rem);
    color: var(--color-slate-700);
    line-height: 1.6;
}

.profile-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    /* Fluid padding */
    padding: clamp(1.5rem, 4vw, 2rem);
    border: 2px solid var(--color-slate-200);
}

.profile-placeholder {
    background: var(--color-slate-100);
    border-radius: var(--radius-lg);
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.stats-showcase {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    /* Fluid padding */
    padding: clamp(1rem, 3vw, 1.5rem);
    border: 2px solid var(--color-slate-200);
}

.stats-image {
    width: 100%;
    border-radius: var(--radius-md);
    background: var(--color-slate-100);
}

.stats-highlights {
    margin-top: var(--spacing-2xl);
}

.highlight {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-slate-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.highlight-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(91, 108, 246, 0.1);
}

.highlight-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--color-satin);
}

.highlight:nth-child(1) .highlight-icon {
    background: rgba(245, 87, 108, 0.1);
}

.highlight:nth-child(1) .highlight-icon svg {
    stroke: var(--color-accent-pattern);
}

.highlight:nth-child(2) .highlight-icon {
    background: rgba(0, 242, 254, 0.1);
}

.highlight:nth-child(2) .highlight-icon svg {
    stroke: var(--color-accent-speed);
}

.highlight:nth-child(3) .highlight-icon {
    background: rgba(56, 249, 215, 0.1);
}

.highlight:nth-child(3) .highlight-icon svg {
    stroke: var(--color-accent-executive);
}

.highlight-title {
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.125rem);
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: var(--spacing-xs);
}

.highlight-text {
    color: var(--color-slate-600);
    font-size: clamp(0.875rem, 1.2vw + 0.5rem, 0.9375rem);
}

.column-content {
    max-width: 100%;
}

.column-visual {
    position: relative;
}

@media (min-width: 1025px) {
    .column-content {
        max-width: 540px;
    }
}

/* === Features List === */
.features-list {
    display: grid;
    /* Mobile-first: single column, auto-fit on larger screens */
    grid-template-columns: 1fr;
    gap: clamp(0.75rem, 2vw, 1.5rem);
}

@media (min-width: 769px) {
    .features-list {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

.feature-item {
    display: flex;
    gap: clamp(0.75rem, 2vw, 1rem);
    padding: clamp(1rem, 3vw, 1.5rem);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-slate-200);
    transition: all var(--transition-base);
    -webkit-tap-highlight-color: transparent;
}

/* Hover effects only on devices with hover capability */
@media (hover: hover) {
    .feature-item:hover {
        border-color: var(--color-satin);
        transform: translateY(-2px);
    }
}

/* Touch devices: use active state */
@media (hover: none) {
    .feature-item:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
}

.feature-item-icon {
    font-size: clamp(1.5rem, 3vw, 3rem);
    }

    .feature-item-text {
        font-size: 0.9375rem;
    }
}

.feature-item-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    color: var(--color-satin);
}

.feature-item-icon svg {
    width: 100%;
    height: 100%;
}

.feature-item-title {
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.125rem);
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: var(--spacing-xs);
}

.feature-item-text {
    color: var(--color-slate-600);
    line-height: 1.6;
    font-size: clamp(0.9375rem, 1.2vw + 0.5rem, 1rem);
}

/* === Cognitive Stats Section === */
.cognitive-stats-section {
    background: linear-gradient(135deg, var(--color-slate-50) 0%, var(--color-white) 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1.5rem, 4vw, 2rem);
    margin-top: var(--spacing-3xl);
}

@media (min-width: 641px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: clamp(2rem, 5vw, 3rem);
    text-align: center;
    border: 2px solid var(--color-slate-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* Hover effects only on hover-capable devices */
@media (hover: hover) {
    .stat-card:hover {
        transform: translateY(-8px);
        border-color: var(--color-satin);
    }

    .stat-card:hover .stat-icon {
        transform: scale(1.1);
    }
}

/* Touch devices */
@media (hover: none) {
    .stat-card:active {
        transform: scale(0.98);
    }
}

.stat-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(91, 108, 246, 0.1);
    transition: transform var(--transition-base);
}

.stat-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--color-satin);
    stroke-width: 2.5;
}

.stat-value {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 900;
    color: var(--color-satin);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: var(--spacing-md);
}

.stat-description {
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    color: var(--color-slate-600);
    line-height: 1.6;
}

/* Different accent colors for each stat */
.stat-card:nth-child(1) .stat-icon {
    background: rgba(245, 87, 108, 0.1);
}

.stat-card:nth-child(1) .stat-icon svg {
    stroke: var(--color-accent-pattern);
}

.stat-card:nth-child(1) .stat-value {
    color: var(--color-accent-pattern);
}

.stat-card:nth-child(2) .stat-icon {
    background: rgba(0, 242, 254, 0.1);
}

.stat-card:nth-child(2) .stat-icon svg {
    stroke: var(--color-accent-speed);
}

.stat-card:nth-child(2) .stat-value {
    color: var(--color-accent-speed);
}

.stat-card:nth-child(3) .stat-icon {
    background: rgba(56, 249, 215, 0.1);
}

.stat-card:nth-child(3) .stat-icon svg {
    stroke: var(--color-accent-executive);
}

.stat-card:nth-child(3) .stat-value {
    color: var(--color-accent-executive);
}

/* === Dashboard Section === */
.dashboard-section {
    background: var(--color-white);
}

.two-column-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 6vw, 4rem);
    align-items: center;
}

@media (min-width: 1025px) {
    .two-column-layout {
        grid-template-columns: 1fr 1fr;
    }
}

.column-content {
    max-width: 600px;
}

.phone-mockup-small {
    max-width: clamp(240px, 50vw, 360px);
}

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

.feature-checklist {
    list-style: none;
    padding: 0;
    margin: clamp(1.5rem, 4vw, 2rem) 0 0;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    color: var(--color-slate-700);
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    line-height: 1.6;
}

.checklist-icon {
    width: 20px;
    height: 20px;
    min-width: 20px;
    stroke: var(--color-satin);
    stroke-width: 2.5;
    margin-top: 2px;
}

/* === CTA Section === */
.cta-section {
    background: var(--color-satin);
    color: var(--color-white);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
}

.cta-subtitle {
    font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
    line-height: 1.6;
}

.cta-section .btn-primary {
    background: var(--color-white);
    color: var(--color-satin);
}

.cta-section .btn-primary:hover {
    background: var(--color-slate-100);
    transform: translateY(-2px);
}

.cta-note {
    margin-top: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9375rem;
}

/* === Updates Section === */
.updates-section {
    background: var(--color-white);
}

.updates-timeline {
    max-width: 800px;
    margin: 0 auto;
    padding-left: clamp(1rem, 3vw, 2rem);
    border-left: 3px solid var(--color-slate-200);
}

.update-item {
    position: relative;
    padding-bottom: clamp(2rem, 5vw, 3rem);
    padding-left: clamp(1.5rem, 4vw, 2rem);
}

.update-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--color-satin);
    border: 3px solid var(--color-white);
}

.update-date {
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    font-weight: 600;
    color: var(--color-satin);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.update-title {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: var(--spacing-sm);
}

.update-description {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--color-slate-600);
    line-height: 1.6;
}

/* === Contact/Feedback Section === */
.contact-section {
    background: var(--color-slate-50);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 6vw, 4rem);
    max-width: 1000px;
    margin: 0 auto;
}

@media (min-width: 1025px) {
    .contact-content {
        grid-template-columns: 1fr 1.2fr;
        align-items: start;
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: clamp(1rem, 3vw, 1.5rem);
}

.contact-card {
    background: var(--color-white);
    padding: clamp(1.5rem, 4vw, 2rem);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-slate-200);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(91, 108, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-satin);
}

.contact-card-title {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: var(--spacing-xs);
}

.contact-card-text {
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    color: var(--color-slate-600);
    line-height: 1.6;
}

/* Contact Form */
.contact-form {
    background: var(--color-white);
    padding: clamp(2rem, 5vw, 3rem);
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-slate-200);
}

.form-group {
    margin-bottom: clamp(1.25rem, 3vw, 1.5rem);
}

.form-label {
    display: block;
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    font-weight: 600;
    color: var(--color-slate-900);
    margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: clamp(0.75rem, 2vw, 1rem);
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    font-family: var(--font-sans);
    color: var(--color-slate-900);
    background: var(--color-white);
    border: 2px solid var(--color-slate-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:hover,
.form-textarea:hover {
    border-color: var(--color-slate-400);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-satin);
    box-shadow: 0 0 0 3px rgba(91, 108, 246, 0.1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%235B6CF6' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 20px 20px;
    padding-right: 3rem;
    cursor: pointer;
    font-weight: 500;
    position: relative;
}

.form-select:hover {
    border-color: var(--color-satin);
    background-color: rgba(91, 108, 246, 0.02);
}

.form-select:focus {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%235B6CF6' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

/* Custom styled select options */
.form-select option {
    padding: 1rem;
    font-weight: 500;
    color: var(--color-slate-900);
    background: var(--color-white);
}

.form-select option:first-child {
    color: var(--color-slate-500);
    font-weight: 400;
}

.form-select option:not(:first-child) {
    padding-left: 1rem;
}

/* Webkit/Blink specific option styling */
.form-select option:checked {
    background: linear-gradient(135deg, rgba(91, 108, 246, 0.15) 0%, rgba(91, 108, 246, 0.08) 100%);
    color: var(--color-satin);
    font-weight: 600;
}

/* Firefox specific option styling */
@-moz-document url-prefix() {
    .form-select option:checked {
        background-color: rgba(91, 108, 246, 0.15);
    }
}

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

.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-slate-500);
}

.form-status {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    text-align: center;
}

.form-status-success {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-status-error {
    background: rgba(239, 68, 68, 0.1);
    color: #DC2626;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* === Footer === */
.footer {
    background: var(--color-slate-900);
    color: var(--color-white);
    /* Fluid padding */
    padding: clamp(2rem, 6vw, 4rem) 0 clamp(1rem, 3vw, 2rem);
}

.footer-content {
    display: grid;
    /* Mobile-first: single column, three columns on desktop */
    grid-template-columns: 1fr;
    gap: clamp(1.5rem, 4vw, 4rem);
    margin-bottom: clamp(2rem, 4vw, 3rem);
}

@media (min-width: 769px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: var(--color-slate-400);
    margin-bottom: var(--spacing-lg);
}

/* Creator Info */
.creator-info {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-slate-800);
}

.creator-text {
    font-size: 0.9375rem;
    color: var(--color-slate-400);
    margin-bottom: var(--spacing-sm);
}

.creator-link {
    color: var(--color-satin);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.creator-link:hover {
    color: var(--color-white);
}

.creator-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-slate-400);
    text-decoration: none;
    background: var(--color-slate-800);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.social-link:hover {
    color: var(--color-white);
    background: var(--color-slate-700);
    transform: translateY(-2px);
}

.social-link svg {
    width: 16px;
    height: 16px;
}

.footer-heading {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-slate-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--color-slate-800);
    text-align: center;
}

.footer-copyright {
    color: var(--color-slate-500);
    font-size: 0.875rem;
}


/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* === Responsive === */
@media (max-width: 640px) {
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .stat-divider {
        display: none;
    }

    .section-header {
        margin-bottom: clamp(1.5rem, 4vw, 2rem);
    }
}

/* === Landscape Mobile Optimizations === */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding-top: calc(var(--spacing-xl) + 60px);
        padding-bottom: var(--spacing-2xl);
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }
}

/* === Touch Device Optimizations === */
@media (hover: none) and (pointer: coarse) {
    /* Remove all hover effects on touch devices */
    .btn-primary:hover,
    .feature-card:hover,
    .mode-card:hover,
    .feature-item:hover {
        transform: none;
    }

    /* Add active states for touch feedback */
    .btn-primary:active {
        transform: scale(0.97);
    }

    .feature-card:active,
    .mode-card:active {
        transform: scale(0.98);
        opacity: 0.95;
    }
}

/* === High DPI Screens === */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body {
        -webkit-font-smoothing: subpixel-antialiased;
    }
}

/* === Safe Area Insets for Notched Devices === */
@supports (padding: env(safe-area-inset-top)) {
    .nav {
        padding-top: max(var(--spacing-lg), env(safe-area-inset-top));
        padding-left: max(var(--spacing-xl), env(safe-area-inset-left));
        padding-right: max(var(--spacing-xl), env(safe-area-inset-right));
    }

    .hero {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }

    .footer {
        padding-bottom: max(var(--spacing-2xl), env(safe-area-inset-bottom));
    }
}