/* ============================================
   PastePaw — Modern Tech Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
    /* Colors - Light Mode */
    --bg-main: #fcfcfd;
    --bg-secondary: #f3f4f6;
    --text-main: #111827;
    --text-muted: #4b5563;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    
    /* Gradients */
    --grad-hero: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
    --grad-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.4) 100%);
    
    /* Tokens */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --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);
    
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration: 0.4s;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-main: #030712;
        --bg-secondary: #111827;
        --text-main: #f9fafb;
        --text-muted: #9ca3af;
        --accent: #60a5fa;
        --accent-glow: rgba(96, 165, 250, 0.3);
        --border-color: rgba(255, 255, 255, 0.1);
        --glass-bg: rgba(17, 24, 39, 0.7);
        --glass-border: rgba(255, 255, 255, 0.1);
        
        --grad-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    }
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* --- Background Tech Elements --- */
.grid-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: 
        radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, black 0%, transparent 100%);
}

.mesh-glow {
    position: fixed;
    top: -10%;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 80vh;
    background: radial-gradient(circle at 50% 0%, var(--accent-glow) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
    filter: blur(80px);
}

/* --- Layout --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
}

/* --- Navbar --- */
nav {
    position: sticky;
    top: 20px;
    z-index: 100;
    margin-top: 20px;
}

.nav-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    padding: 8px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
    max-width: fit-content;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-main);
    text-decoration: none;
}

.nav-logo img {
    width: 28px;
    height: 28px;
}

.nav-links {
    display: flex;
    gap: 24px;
    margin-left: 40px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--accent);
}

/* --- Hero --- */
.hero {
    text-align: center;
    padding-top: 60px;
    padding-bottom: 80px;
}

.badge-new {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    background: var(--grad-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p.description {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto 40px;
}

.cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--duration) var(--ease-out);
    gap: 8px;
}

.btn-primary {
    background: var(--text-main);
    color: var(--bg-main);
    box-shadow: 0 10px 20px -5px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 15px 30px -5px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

/* --- Hero Slider --- */
.hero-visual {
    margin-top: 60px;
    display: flex;
    justify-content: center;
    position: relative;
}

.slider-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    display: flex;
    align-items: center;
}

.slider-track {
    width: 100%;
    aspect-ratio: 16 / 10;
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--glass-border);
    background: var(--bg-secondary);
}

.slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
    transform: scale(1.05);
}

.slide.active {
    opacity: 1;
    transform: scale(1);
    z-index: 2;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s var(--ease-out);
    box-shadow: var(--shadow-md);
}

.slider-arrow:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.slider-arrow.prev { left: -24px; }
.slider-arrow.next { right: -24px; }

.slider-dots {
    position: absolute;
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    width: 24px;
    border-radius: 4px;
    background: var(--accent);
}

@media (max-width: 768px) {
    .slider-arrow {
        width: 40px;
        height: 40px;
    }
    .slider-arrow.prev { left: 10px; }
    .slider-arrow.next { right: 10px; }
}

/* --- Bento Grid --- */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: minmax(200px, auto);
    gap: 20px;
}

.bento-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: transform var(--duration) var(--ease-out), box-shadow var(--duration) var(--ease-out);
}

.bento-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.bento-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.bento-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.bento-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    display: block;
}

.col-span-2 { grid-column: span 2; }
.row-span-2 { grid-row: span 2; }

/* --- Shortcuts --- */
.shortcuts-wrap {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 60px;
    text-align: center;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.key-group {
    display: flex;
    gap: 4px;
    align-items: center;
}

kbd {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-bottom: 3px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    min-width: 32px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.shortcut-box {
    background: var(--bg-main);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

/* --- Footer --- */
footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-links-group {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    color: var(--text-muted);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s var(--ease-out);
}

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

/* --- Content Pages (Privacy, Terms, Support) --- */
.page-content {
    max-width: 800px;
    margin: 60px auto;
}

.content-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 48px;
    margin-bottom: 40px;
}

.content-card h1 { margin-bottom: 24px; }
.content-card h2 { margin-top: 40px; margin-bottom: 16px; font-size: 1.5rem; }
.content-card h3 { margin-top: 24px; margin-bottom: 12px; font-size: 1.2rem; }
.content-card p { margin-bottom: 16px; color: var(--text-muted); }
.content-card ul { margin-bottom: 24px; padding-left: 20px; color: var(--text-muted); }
.content-card li { margin-bottom: 8px; }

.highlight-box {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent);
    margin: 32px 0;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 40px;
    transition: color 0.2s;
}

.back-btn:hover {
    color: var(--accent);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    section { padding: 60px 0; }
    
    .nav-links { display: none; }
    
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .col-span-2 { grid-column: span 1; }
    
    .footer-links-group {
        gap: 40px;
        flex-wrap: wrap;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}