/**
 * Bob AI v2 - Splash Page Styles
 * Lusion-inspired dark theme with animated background
 */

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

:root {
    --accent: #1a2ffb;
    --accent-cyan: #00d4ff;
    --text-light: #f0f1fa;
    --text-muted: rgba(240, 241, 250, 0.6);
    --bg-dark: #000000;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(26, 47, 251, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
#vanta-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4rem;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-light) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 3rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-cta {
    padding: 0.75rem 1.75rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(26, 47, 251, 0.4);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
}

.hero-content {
    max-width: 900px;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(26, 47, 251, 0.15);
    border: 1px solid var(--border-accent);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-cyan);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.hero-line {
    display: block;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-line:nth-child(1) { animation-delay: 0.3s; }
.hero-line:nth-child(2) { animation-delay: 0.5s; }
.hero-line:nth-child(3) {
    animation-delay: 0.7s;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    font-weight: 400;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto 3rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.9s forwards;
}

.hero-buttons {
    display: flex;
    gap: 1.25rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease 1.1s forwards;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
    padding: 1.1rem 2.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-cyan) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-primary span {
    position: relative;
    z-index: 1;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow:
        0 10px 40px rgba(26, 47, 251, 0.4),
        0 0 80px rgba(26, 47, 251, 0.2);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-secondary {
    padding: 1.1rem 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

/* ============================================
   SCROLL INDICATOR
   ============================================ */
.scroll-hint {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards;
}

.scroll-hint span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 2px;
    animation: scrollDot 1.5s ease-in-out infinite;
}

@keyframes scrollDot {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: 0.3; }
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
    position: relative;
    z-index: 1;
    padding: 8rem 4rem;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border-accent);
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(26, 47, 251, 0.15);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-cyan) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 30px rgba(26, 47, 251, 0.3);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    position: relative;
    z-index: 1;
    padding: 8rem 4rem;
    text-align: center;
}

.cta-card {
    max-width: 700px;
    margin: 0 auto;
    background: rgba(26, 47, 251, 0.1);
    border: 1px solid rgba(26, 47, 251, 0.2);
    border-radius: 24px;
    padding: 4rem;
    backdrop-filter: blur(20px);
}

.cta-card h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.cta-card p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    position: relative;
    z-index: 1;
    padding: 3rem 4rem;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */
@media (max-width: 1024px) {
    .nav {
        padding: 1.25rem 2rem;
    }

    .nav-links {
        gap: 2rem;
    }

    .features {
        padding: 6rem 2rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */
@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        display: none;
    }

    .nav-cta {
        padding: 0.625rem 1.25rem;
        font-size: 0.85rem;
    }

    .hero {
        padding: 6rem 1.5rem 3rem;
        min-height: auto;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }

    .hero-title {
        font-size: clamp(2rem, 10vw, 3rem);
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 1rem 2rem;
        justify-content: center;
    }

    .scroll-hint {
        display: none;
    }

    .features,
    .cta-section {
        padding: 4rem 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feature-card {
        padding: 1.75rem;
    }

    .feature-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
        border-radius: 12px;
    }

    .section-title {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }

    .cta-card {
        padding: 2.5rem 1.5rem;
        border-radius: 16px;
    }

    .cta-card h2 {
        font-size: clamp(1.25rem, 5vw, 1.75rem);
    }

    .footer {
        padding: 2rem 1.5rem;
    }
}

/* ============================================
   RESPONSIVE - SMALL MOBILE
   ============================================ */
@media (max-width: 480px) {
    .nav {
        padding: 0.875rem 1rem;
    }

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

    .hero {
        padding: 5rem 1rem 2rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .features,
    .cta-section {
        padding: 3rem 1rem;
    }

    .section-header {
        margin-bottom: 3rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .feature-card h3 {
        font-size: 1.1rem;
    }

    .feature-card p {
        font-size: 0.875rem;
    }

    .cta-card {
        padding: 2rem 1.25rem;
    }
}

/* ============================================
   SAFE AREA (NOTCH DEVICES)
   ============================================ */
@supports (padding-top: env(safe-area-inset-top)) {
    .nav {
        padding-top: calc(1rem + env(safe-area-inset-top));
    }

    .footer {
        padding-bottom: calc(2rem + env(safe-area-inset-bottom));
    }
}