/* ============================================
   CSS Variables
   ============================================ */

:root {
    /* TD Green (accent) */
    --td-green: #003F2D;
    --td-green-dark: #0a2f23;
    
    /* Neutral Palette */
    --color-bg: #FAFAFA;
    --color-text: #1A1A1A;
    --color-text-light: #666666;
    
    /* Typography */
    --font-family: 'Graphik', 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Layout */
    --container-width: 1200px;
    --container-padding: 2rem;
    
    /* Shadows & Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(0, 166, 81, 0.15);
    
    /* Transitions */
    --transition-base: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-regular);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Top Badge
   ============================================ */

.top-badge {
    position: fixed;
    top: 1.4rem;
    right: 1.4rem;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    box-shadow: var(--shadow-md);
    font-size: 0.75rem;
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    backdrop-filter: blur(6px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--td-green);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 6px rgba(0, 63, 45, 0.1);
}

@media (max-width: 768px) {
    .top-badge {
        top: 0.9rem;
        right: 0.9rem;
        font-size: 0.7rem;
        padding: 0.4rem 0.8rem;
    }
}

/* ============================================
   Main Container
   ============================================ */

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--spacing-xl) + 3rem) var(--container-padding) var(--spacing-lg);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-semibold);
    color: var(--td-green);
    margin-bottom: 0.75rem;
}

.hero-description {
    font-size: clamp(1.05rem, 1.6vw, 1.3rem);
    color: var(--color-text-light);
    max-width: 760px;
    margin: 1rem auto 0;
    line-height: 1.7;
}

/* ============================================
   Demo Sections
   ============================================ */

.demo-section {
    margin-bottom: var(--spacing-xl);
    min-height: 55vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--container-padding);
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    width: 100%;
}

.demo-content.reverse {
    direction: rtl;
}

.demo-content.reverse > * {
    direction: ltr;
}

.demo-text {
    max-width: 500px;
}

.demo-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-semibold);
    color: var(--td-green);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.demo-description {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ============================================
   iPhone Device Frame
   ============================================ */

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

.iphone-frame {
    position: relative;
    width: 310px;
    max-width: 88vw;
    aspect-ratio: 9 / 19.5;
    background: #0f0f0f;
    border-radius: 28px;
    padding: 6px;
    box-shadow: 
        0 14px 40px rgba(0, 0, 0, 0.28),
        0 0 0 1px rgba(255, 255, 255, 0.08) inset,
        var(--shadow-glow);
    transition: transform var(--transition-base);
}

.iphone-frame:hover {
    transform: translateY(-4px);
}

.iphone-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 118px;
    height: 18px;
    background: #0f0f0f;
    border-radius: 0 0 14px 14px;
    z-index: 10;
}

.iphone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 24px;
    overflow: hidden;
    position: relative;
}

.demo-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.iphone-reflection {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.15) 0%,
        transparent 30%,
        transparent 70%,
        rgba(255, 255, 255, 0.05) 100%
    );
    border-radius: 24px;
    pointer-events: none;
    z-index: 6;
}

/* ============================================
   Closing Section
   ============================================ */

.closing {
    text-align: center;
    padding: var(--spacing-lg) 0 0;
    margin-top: var(--spacing-xl);
}

.closing-text {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* ============================================
   Mobile Responsive
   ============================================ */

@media (max-width: 968px) {
    .demo-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .demo-content.reverse {
        direction: ltr;
    }
    
    .demo-device {
        order: -1;
    }
    
    .iphone-frame {
        width: 280px;
    }
    
    .main-container {
        padding: var(--spacing-lg) var(--container-padding) var(--spacing-xl);
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
        margin-bottom: var(--spacing-lg);
    }
    
    .demo-section {
        margin-bottom: var(--spacing-lg);
        min-height: auto;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
        --spacing-xxl: 4rem;
    }
}