/* BoardBuddy AI - Styles | Design: Liquid Glass + Board Game Theme */

:root {
    --gradient-primary: linear-gradient(135deg, #8B4513 0%, #D2691E 50%, #FF7F50 100%);
    --gradient-accent: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    --gradient-dark: linear-gradient(135deg, #2C1810 0%, #4A2511 50%, #6B3410 100%);
    --glass-light: rgba(255, 255, 255, 0.15);
    --glass-light-border: rgba(255, 255, 255, 0.3);
    --glass-gold: rgba(255, 215, 0, 0.2);
    --glass-gold-border: rgba(255, 215, 0, 0.4);
    --radius-xl: 24px;
    --radius-full: 9999px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --color-neutral-100: #F5F5DC;
    --color-neutral-200: #DEB887;
    --color-neutral-300: #BC8F8F;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --z-header: 1000;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-family); line-height: 1.6; color: var(--color-neutral-100); background: var(--gradient-dark); overflow-x: hidden; }

h1 { font-size: var(--text-5xl); font-weight: 700; line-height: 1.2; }
h2 { font-size: var(--text-4xl); font-weight: 700; line-height: 1.2; }
h3 { font-size: var(--text-2xl); font-weight: 700; line-height: 1.2; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
ul { list-style: none; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--spacing-md); }
.section { padding: var(--spacing-2xl) 0; position: relative; }
.gradient-text { background: var(--gradient-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.glass-card {
    background: var(--glass-light);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-light-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.glass-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%); opacity: 0; transition: opacity 0.5s ease; }
.glass-card:hover { background: rgba(255, 255, 255, 0.2); border-color: rgba(255, 255, 255, 0.4); box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15), inset 0 0 20px rgba(255, 215, 0, 0.1); transform: translateY(-4px); }
.glass-card:hover::before { opacity: 1; }

.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.875rem 1.75rem; border: none; border-radius: var(--radius-xl); font-size: var(--text-base); font-weight: 600; cursor: pointer; transition: all 0.3s ease; }
.btn i { width: 20px; height: 20px; }
.btn-primary { background: linear-gradient(135deg, rgba(255, 215, 0, 0.3) 0%, rgba(255, 165, 0, 0.3) 100%); backdrop-filter: blur(16px); border: 2px solid var(--glass-gold-border); color: var(--color-neutral-100); box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3); }
.btn-primary:hover { background: linear-gradient(135deg, rgba(255, 215, 0, 0.4) 0%, rgba(255, 165, 0, 0.4) 100%); box-shadow: 0 12px 32px rgba(255, 215, 0, 0.4); transform: translateY(-2px); }
.btn-primary:active { transform: scale(0.96); }
.btn-secondary { background: var(--glass-light); backdrop-filter: blur(16px); border: 2px solid var(--glass-light-border); color: var(--color-neutral-100); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.2); border-color: rgba(255, 255, 255, 0.4); }

.header { position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-header); background: rgba(0, 0, 0, 0.3); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 1rem var(--spacing-md); }
.nav-brand { display: flex; align-items: center; gap: 0.75rem; font-size: var(--text-xl); font-weight: 700; }
.brand-icon { width: 32px; height: 32px; color: #FFD700; }
.menu-toggle { display: none; background: none; border: none; color: var(--color-neutral-100); cursor: pointer; padding: 0.5rem; }
.menu-toggle i { width: 24px; height: 24px; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { font-weight: 500; position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; right: 0; height: 2px; background: var(--gradient-accent); transform: scaleX(0); transition: transform 0.3s ease; }
.nav-links a:hover::after { transform: scaleX(1); }
.cta-link { padding: 0.5rem 1.25rem; background: var(--glass-gold); border: 1px solid var(--glass-gold-border); border-radius: var(--radius-full); }
.cta-link:hover { background: rgba(255, 215, 0, 0.3); }

.hero { min-height: 100vh; display: flex; align-items: center; position: relative; padding-top: 80px; overflow: hidden; }
.hero-container { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); align-items: center; position: relative; z-index: 10; }
.hero-content { padding: var(--spacing-lg); }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem; background: var(--glass-light); backdrop-filter: blur(12px); border: 1px solid var(--glass-light-border); border-radius: var(--radius-full); font-size: var(--text-sm); margin-bottom: var(--spacing-md); }
.hero-badge i { width: 16px; height: 16px; color: #FFD700; }
.hero-title { font-size: var(--text-6xl); line-height: 1.1; margin-bottom: var(--spacing-md); }
.hero-subtitle { font-size: var(--text-xl); color: var(--color-neutral-200); margin-bottom: var(--spacing-xl); line-height: 1.8; }
.hero-cta { display: flex; gap: 1rem; margin-bottom: var(--spacing-xl); }
.hero-stats { display: flex; gap: var(--spacing-lg); flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; padding: 1rem; background: var(--glass-light); backdrop-filter: blur(12px); border: 1px solid var(--glass-light-border); border-radius: var(--radius-xl); min-width: 100px; }
.stat-item i { width: 24px; height: 24px; color: #FFD700; }
.stat-value { font-size: var(--text-xl); font-weight: 700; color: #FFD700; }
.stat-label { font-size: var(--text-sm); color: var(--color-neutral-200); }

.hero-visual { position: relative; height: 500px; display: flex; align-items: center; justify-content: center; }
.dice-container { position: relative; z-index: 10; }
.dice-animation { font-size: 8rem; filter: drop-shadow(0 20px 40px rgba(255, 215, 0, 0.3)); animation: float 3s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }
.floating-card { position: absolute; font-size: 4rem; animation: floatRotate 4s ease-in-out infinite; animation-delay: var(--delay); filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2)); }
.floating-card:nth-child(2) { top: 10%; left: 10%; }
.floating-card:nth-child(3) { top: 20%; right: 15%; }
.floating-card:nth-child(4) { bottom: 15%; left: 20%; }
@keyframes floatRotate { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-30px) rotate(10deg); } }

.hero-bg { position: absolute; inset: 0; z-index: 1; overflow: hidden; }
.bg-gradient { position: absolute; inset: 0; background: var(--gradient-dark); opacity: 0.9; }
.bg-pattern { position: absolute; inset: 0; background-image: radial-gradient(circle at 20% 30%, rgba(255, 215, 0, 0.1) 0%, transparent 50%), radial-gradient(circle at 80% 70%, rgba(255, 127, 80, 0.1) 0%, transparent 50%); }

.section-header { text-align: center; max-width: 800px; margin: 0 auto var(--spacing-xl); }
.section-title { font-size: var(--text-4xl); margin-bottom: var(--spacing-md); }
.section-subtitle { font-size: var(--text-xl); color: var(--color-neutral-200); }

.features { background: rgba(0, 0, 0, 0.2); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-lg); }
.feature-card { padding: var(--spacing-xl); text-align: center; }
.feature-icon { width: 64px; height: 64px; margin: 0 auto var(--spacing-md); display: flex; align-items: center; justify-content: center; background: var(--gradient-accent); border-radius: var(--radius-xl); box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3); }
.feature-icon i { width: 32px; height: 32px; color: #2C1810; }
.feature-title { font-size: var(--text-2xl); margin-bottom: var(--spacing-sm); }
.feature-description { color: var(--color-neutral-200); line-height: 1.8; }

.steps-container { display: grid; gap: var(--spacing-xl); }
.step-item { display: grid; grid-template-columns: auto 1fr; gap: var(--spacing-lg); align-items: start; }
.step-number { font-size: var(--text-5xl); font-weight: 700; background: var(--gradient-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.step-content { padding: var(--spacing-lg); display: grid; grid-template-columns: auto 1fr; gap: var(--spacing-md); align-items: start; }
.step-icon { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--glass-gold); border: 1px solid var(--glass-gold-border); border-radius: var(--radius-xl); }
.step-icon i { width: 24px; height: 24px; color: #FFD700; }
.step-title { font-size: var(--text-xl); margin-bottom: 0.5rem; }
.step-description { color: var(--color-neutral-200); line-height: 1.8; }

.use-cases { background: rgba(0, 0, 0, 0.2); }
.use-cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-lg); }
.use-case-card { padding: var(--spacing-xl); }
.use-case-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: var(--gradient-primary); border-radius: var(--radius-xl); margin-bottom: var(--spacing-md); }
.use-case-icon i { width: 28px; height: 28px; color: var(--color-neutral-100); }
.use-case-title { font-size: var(--text-xl); margin-bottom: var(--spacing-sm); }
.use-case-problem { font-size: var(--text-base); color: #FFA500; font-style: italic; margin-bottom: var(--spacing-sm); }
.use-case-solution { color: var(--color-neutral-200); line-height: 1.8; }

.cta-section { padding: var(--spacing-2xl) 0; }
.cta-card { padding: var(--spacing-2xl); text-align: center; max-width: 800px; margin: 0 auto; }
.cta-title { font-size: var(--text-4xl); margin-bottom: var(--spacing-md); }
.cta-subtitle { font-size: var(--text-xl); color: var(--color-neutral-200); margin-bottom: var(--spacing-xl); }
.waitlist-form { max-width: 600px; margin: 0 auto; }
.form-group { display: flex; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.form-group input { flex: 1; min-width: 250px; padding: 1rem 1.5rem; background: var(--glass-light); backdrop-filter: blur(12px); border: 2px solid var(--glass-light-border); border-radius: var(--radius-xl); color: var(--color-neutral-100); font-size: var(--text-base); font-family: var(--font-family); transition: all 0.3s ease; }
.form-group input::placeholder { color: var(--color-neutral-300); }
.form-group input:focus { outline: none; border-color: var(--glass-gold-border); box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.1), inset 0 0 12px rgba(255, 215, 0, 0.05); }
.form-message { text-align: center; padding: 0.75rem; border-radius: var(--radius-xl); font-size: var(--text-sm); margin-bottom: 1rem; display: none; }
.form-message.success { display: block; background: rgba(47, 79, 79, 0.2); border: 1px solid rgba(47, 79, 79, 0.4); color: #7FFF7F; }
.form-message.error { display: block; background: rgba(139, 0, 0, 0.2); border: 1px solid rgba(139, 0, 0, 0.4); color: #FF6B6B; }
.form-privacy { display: flex; align-items: center; justify-content: center; gap: 0.5rem; font-size: var(--text-sm); color: var(--color-neutral-300); }
.form-privacy i { width: 16px; height: 16px; }

.footer { background: rgba(0, 0, 0, 0.4); padding: var(--spacing-2xl) 0 var(--spacing-lg); border-top: 1px solid rgba(255, 255, 255, 0.1); }
.footer-container { display: grid; grid-template-columns: 2fr 1fr; gap: var(--spacing-xl); margin-bottom: var(--spacing-xl); }
.footer-brand { max-width: 500px; }
.footer-logo { display: flex; align-items: center; gap: 0.75rem; font-size: var(--text-2xl); font-weight: 700; margin-bottom: var(--spacing-md); }
.footer-logo i { width: 32px; height: 32px; color: #FFD700; }
.footer-description { color: var(--color-neutral-200); line-height: 1.8; }
.footer-links { display: flex; gap: var(--spacing-xl); }
.footer-column h4 { font-size: var(--text-lg); margin-bottom: var(--spacing-sm); color: #FFD700; }
.footer-column ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-column li { display: flex; align-items: center; gap: 0.5rem; }
.footer-column li i { width: 16px; height: 16px; }
.footer-column a:hover { color: #FFD700; }
.footer-bottom { text-align: center; padding-top: var(--spacing-lg); border-top: 1px solid rgba(255, 255, 255, 0.1); color: var(--color-neutral-300); font-size: var(--text-sm); }
.footer-tagline { margin-top: 0.5rem; font-style: italic; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
.animate-on-scroll { opacity: 0; }
.animate-on-scroll.fade-in-up { animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards; }
.animate-on-scroll:nth-child(1) { animation-delay: 0.1s; }
.animate-on-scroll:nth-child(2) { animation-delay: 0.2s; }
.animate-on-scroll:nth-child(3) { animation-delay: 0.3s; }
.animate-on-scroll:nth-child(4) { animation-delay: 0.4s; }
.animate-on-scroll:nth-child(5) { animation-delay: 0.5s; }
.animate-on-scroll:nth-child(6) { animation-delay: 0.6s; }

@media (max-width: 767px) {
    .menu-toggle { display: block; }
    .nav-links { position: fixed; top: 70px; left: 0; right: 0; flex-direction: column; background: rgba(0, 0, 0, 0.3); backdrop-filter: blur(20px); padding: var(--spacing-lg); gap: 1rem; transform: translateY(-100%); opacity: 0; visibility: hidden; transition: all 0.3s ease; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
    .nav-links.active { transform: translateY(0); opacity: 1; visibility: visible; }
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-title { font-size: var(--text-4xl); }
    .hero-subtitle { font-size: var(--text-lg); }
    .hero-cta { flex-direction: column; align-items: center; }
    .hero-visual { height: 300px; }
    .dice-animation { font-size: 5rem; }
    .floating-card { font-size: 2.5rem; }
    .footer-container { grid-template-columns: 1fr; }
}

@media (min-width: 768px) {
    :root { --text-6xl: 4.5rem; --text-5xl: 3.5rem; --text-4xl: 2.5rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .use-cases-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .features-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1280px) {
    .use-cases-grid { grid-template-columns: repeat(4, 1fr); }
}