/* ===== CSS VARIABLES & RESET ===== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1a1a26;
    --bg-input: #1e1e2a;
    --border-color: rgba(255,255,255,0.06);
    --border-active: rgba(167,139,250,0.4);
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent-1: #a78bfa;
    --accent-2: #06b6d4;
    --accent-3: #f472b6;
    --gradient-main: linear-gradient(135deg, #a78bfa 0%, #06b6d4 100%);
    --gradient-pink: linear-gradient(135deg, #f472b6 0%, #a78bfa 100%);
    --gradient-cyan: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(167,139,250,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* ===== ANIMATED BACKGROUND ===== */
.bg-grid {
    position: fixed; inset: 0; z-index: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.bg-glow {
    position: fixed; border-radius: 50%; filter: blur(120px);
    pointer-events: none; z-index: 0; opacity: 0.4;
    animation: floatGlow 20s ease-in-out infinite;
}
.bg-glow-1 { width: 500px; height: 500px; background: rgba(167,139,250,0.15); top: -10%; left: -5%; animation-delay: 0s; }
.bg-glow-2 { width: 400px; height: 400px; background: rgba(6,182,212,0.12); bottom: 10%; right: -5%; animation-delay: -7s; }
.bg-glow-3 { width: 350px; height: 350px; background: rgba(244,114,182,0.1); top: 50%; left: 40%; animation-delay: -14s; }

@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ===== HEADER ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10,10,15,0.8);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header-inner {
    max-width: 1200px; margin: 0 auto;
    padding: 0 24px; height: 64px;
    display: flex; align-items: center; justify-content: space-between;
}

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-icon svg { width: 32px; height: 32px; }
.logo-text { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.logo-accent { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav { display: flex; gap: 4px; }
.nav-link {
    background: none; border: none; color: var(--text-secondary);
    font-family: var(--font-main); font-size: 0.85rem; font-weight: 500;
    padding: 8px 14px; border-radius: var(--radius-sm);
    cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; gap: 6px;
}
.nav-link:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-link.active {
    color: var(--accent-1); background: rgba(167,139,250,0.1);
    box-shadow: inset 0 0 0 1px rgba(167,139,250,0.2);
}
.nav-icon { font-size: 1rem; }

.mobile-menu-btn {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.mobile-menu-btn span {
    width: 22px; height: 2px; background: var(--text-secondary);
    border-radius: 2px; transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
    position: relative; z-index: 1;
    text-align: center; padding: 140px 24px 60px;
    max-width: 800px; margin: 0 auto;
}

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(167,139,250,0.1);
    border: 1px solid rgba(167,139,250,0.2);
    border-radius: 50px; padding: 6px 16px;
    font-size: 0.8rem; font-weight: 500; color: var(--accent-1);
    margin-bottom: 24px;
    animation: fadeInDown 0.6s ease-out;
}

.pulse-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--accent-1);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800; line-height: 1.1;
    margin-bottom: 16px; letter-spacing: -0.02em;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem; color: var(--text-secondary);
    max-width: 550px; margin: 0 auto 32px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-stats {
    display: flex; justify-content: center; gap: 48px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}
.stat-item { text-align: center; }
.stat-number {
    display: block; font-size: 1.8rem; font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }

/* ===== MAIN CONTENT ===== */
.main-content {
    position: relative; z-index: 1;
    max-width: 800px; margin: 0 auto; padding: 0 24px 80px;
}

.tool-section { display: none; animation: fadeInUp 0.4s ease-out; }
.tool-section.active { display: block; }

/* ===== TOOL CARD ===== */
.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}
.tool-card:hover { border-color: rgba(255,255,255,0.1); box-shadow: var(--shadow-glow); }

.tool-header {
    display: flex; align-items: center; gap: 16px;
    padding: 28px 28px 0;
}

.tool-icon {
    width: 52px; height: 52px; border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; flex-shrink: 0;
}
.tool-icon-video { background: rgba(167,139,250,0.15); }
.tool-icon-image { background: rgba(244,114,182,0.15); }
.tool-icon-tts { background: rgba(6,182,212,0.15); }
.tool-icon-img2prompt { background: rgba(251,191,36,0.15); }
.tool-icon-vid2prompt { background: rgba(52,211,153,0.15); }

.tool-title { font-size: 1.3rem; font-weight: 700; }
.tool-desc { font-size: 0.85rem; color: var(--text-secondary); margin-top: 2px; }

.tool-body { padding: 24px 28px 28px; }

/* ===== INPUTS ===== */
.input-group { margin-bottom: 20px; }

.input-label {
    display: block; font-size: 0.8rem; font-weight: 600;
    color: var(--text-secondary); text-transform: uppercase;
    letter-spacing: 0.05em; margin-bottom: 8px;
}

.input-textarea, .input-text {
    width: 100%; background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md); padding: 14px 16px;
    color: var(--text-primary); font-family: var(--font-main);
    font-size: 0.95rem; resize: vertical;
    transition: var(--transition);
}
.input-textarea:focus, .input-text:focus {
    outline: none; border-color: var(--border-active);
    box-shadow: 0 0 0 3px rgba(167,139,250,0.1);
}
.input-textarea::placeholder, .input-text::placeholder { color: var(--text-muted); }

.input-footer { display: flex; align-items: flex-start; justify-content: space-between; margin-top: 10px; flex-wrap: wrap; gap: 8px; }
.char-count { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); }
.input-hint { font-size: 0.78rem; color: var(--text-muted); margin-top: 8px; }

/* ===== PROMPT SUGGESTIONS ===== */
.prompt-suggestions { display: flex; gap: 6px; flex-wrap: wrap; }
.suggestion-chip {
    background: rgba(255,255,255,0.04); border: 1px solid var(--border-color);
    border-radius: 50px; padding: 4px 12px;
    font-size: 0.75rem; color: var(--text-secondary);
    cursor: pointer; font-family: var(--font-main);
    transition: var(--transition);
}
.suggestion-chip:hover {
    background: rgba(167,139,250,0.1); border-color: rgba(167,139,250,0.3);
    color: var(--accent-1);
}

/* ===== VOICE GRID ===== */
.voice-section { margin-bottom: 16px; }
.voice-category { font-size: 0.85rem; font-weight: 600; margin-bottom: 10px; color: var(--text-secondary); }
.voice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 6px; }
.voice-btn {
    background: var(--bg-input); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); padding: 8px 10px;
    font-size: 0.8rem; color: var(--text-secondary);
    cursor: pointer; font-family: var(--font-main);
    text-transform: capitalize; transition: var(--transition);
}
.voice-btn:hover { border-color: rgba(167,139,250,0.3); color: var(--text-primary); background: rgba(167,139,250,0.05); }
.voice-btn.active {
    background: rgba(167,139,250,0.15); border-color: var(--accent-1);
    color: var(--accent-1); font-weight: 600;
}

/* ===== GENERATE BUTTON ===== */
.btn-generate {
    width: 100%; position: relative; overflow: hidden;
    background: var(--gradient-main); border: none;
    border-radius: var(--radius-md); padding: 16px 24px;
    font-family: var(--font-main); font-size: 1rem; font-weight: 600;
    color: #fff; cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(167,139,250,0.3);
}
.btn-generate:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(167,139,250,0.4); }
.btn-generate:active { transform: translateY(0); }
.btn-generate:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-shimmer {
    position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    animation: shimmer 3s infinite;
}
@keyframes shimmer { 0% { left: -100%; } 100% { left: 200%; } }

.btn-icon { font-size: 1.1rem; }

/* ===== RESULT AREA ===== */
.result-area { padding: 0 28px 28px; display: none; }
.result-area.visible { display: block; animation: fadeInUp 0.4s ease-out; }

.result-box {
    background: var(--bg-input); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 20px; position: relative;
}

.result-label {
    font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.05em; color: var(--accent-1); margin-bottom: 12px;
    display: flex; align-items: center; gap: 6px;
}

.result-video {
    width: 100%; border-radius: var(--radius-md); background: #000;
    aspect-ratio: 16/9;
}
.result-image {
    width: 100%; border-radius: var(--radius-md);
    max-height: 500px; object-fit: contain;
}
.result-audio { width: 100%; margin-top: 8px; border-radius: var(--radius-sm); }

.result-text {
    font-size: 0.92rem; line-height: 1.7; color: var(--text-primary);
    white-space: pre-wrap; word-break: break-word;
}

.result-actions {
    display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap;
}
.btn-action {
    background: rgba(255,255,255,0.05); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); padding: 8px 16px;
    font-size: 0.82rem; font-weight: 500; color: var(--text-secondary);
    cursor: pointer; font-family: var(--font-main);
    transition: var(--transition); display: flex; align-items: center; gap: 6px;
}
.btn-action:hover { background: rgba(167,139,250,0.1); border-color: rgba(167,139,250,0.3); color: var(--accent-1); }

/* ===== LOADING STATE ===== */
.loading-overlay {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; padding: 40px; gap: 16px;
}
.loading-spinner {
    width: 48px; height: 48px; border-radius: 50%;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-1);
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 0.9rem; color: var(--text-secondary); }
.loading-subtext { font-size: 0.78rem; color: var(--text-muted); }

/* ===== ERROR STATE ===== */
.error-box {
    background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.2);
    border-radius: var(--radius-md); padding: 16px;
    color: #fca5a5; font-size: 0.9rem;
    display: flex; align-items: flex-start; gap: 10px;
}
.error-icon { font-size: 1.2rem; flex-shrink: 0; }

/* ===== EXPIRY WARNING ===== */
.expiry-warning {
    background: rgba(251,191,36,0.08); border: 1px solid rgba(251,191,36,0.2);
    border-radius: var(--radius-sm); padding: 10px 14px; margin-top: 12px;
    font-size: 0.78rem; color: #fbbf24;
    display: flex; align-items: center; gap: 8px;
}

/* ===== FOOTER ===== */
.footer {
    position: relative; z-index: 1;
    border-top: 1px solid var(--border-color);
    padding: 40px 24px;
}
.footer-inner { max-width: 1200px; margin: 0 auto; text-align: center; }
.footer-brand { margin-bottom: 20px; }
.footer-tagline { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }
.footer-links { display: flex; justify-content: center; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.footer-link {
    background: none; border: 1px solid var(--border-color);
    border-radius: 50px; padding: 6px 14px;
    font-size: 0.78rem; color: var(--text-secondary);
    cursor: pointer; font-family: var(--font-main);
    transition: var(--transition);
}
.footer-link:hover { border-color: rgba(167,139,250,0.3); color: var(--accent-1); }
.footer-copy { font-size: 0.75rem; color: var(--text-muted); }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }
    .nav {
        display: none; position: absolute; top: 64px; left: 0; right: 0;
        background: rgba(10,10,15,0.95); backdrop-filter: blur(20px);
        flex-direction: column; padding: 12px;
        border-bottom: 1px solid var(--border-color);
    }
    .nav.open { display: flex; }
    .nav-link { padding: 12px 16px; border-radius: var(--radius-sm); }
    .hero { padding: 110px 20px 40px; }
    .hero-stats { gap: 24px; }
    .tool-header { padding: 20px 20px 0; flex-direction: column; text-align: center; }
    .tool-body { padding: 20px; }
    .result-area { padding: 0 20px 20px; }
    .voice-grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); }
    .prompt-suggestions { justify-content: center; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-stats { flex-direction: column; gap: 12px; }
}