/* =========================================================================
   GTC Slideshow Story Maker - CORE DESIGN SYSTEM
   Dark Slate, Glassmorphic Paneling, Glowing Nodes & Celestial Aesthetics
   ========================================================================= */

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

:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.65);
    --bg-card-hover: rgba(51, 65, 85, 0.75);
    --bg-glass: rgba(15, 23, 42, 0.85);
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;
    
    --accent-sky: #38bdf8;
    --accent-cyan: #06b6d4;
    --accent-indigo: #6366f1;
    --accent-amber: #f59e0b;
    --accent-emerald: #10b981;
    --accent-rose: #f43f5e;
    --accent-purple: #a855f7;

    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-bright: rgba(56, 189, 248, 0.3);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(56, 189, 248, 0.25);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    background-image: 
        radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.6) 0%, transparent 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 14px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--accent-sky), var(--accent-indigo));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-glow);
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-badge {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-sky);
    border: 1px solid rgba(56, 189, 248, 0.3);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Nav Tabs */
.nav-tabs {
    display: flex;
    gap: 6px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.nav-tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.nav-tab-btn.active {
    background: var(--accent-indigo);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

/* Header Quick Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-sky), var(--accent-indigo));
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(56, 189, 248, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.07);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-accent {
    background: var(--accent-amber);
    color: #000000;
    font-weight: 700;
}

.btn-accent:hover {
    filter: brightness(1.1);
}

/* Main Content Views */
.main-container {
    flex: 1;
    padding: 24px 28px;
    max-width: 1500px;
    margin: 0 auto;
    width: 100%;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Glassmorphic Panel Containers */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
}

.panel-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-sky);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Responsive Grid Columns */
.grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 1024px) {
    .grid-2col, .grid-3col {
        grid-template-columns: 1fr;
    }
    .app-header {
        flex-direction: column;
        gap: 14px;
        align-items: flex-start;
    }
}

/* Status Pill & Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-prime {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-sky {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-sky);
    border: 1px solid rgba(56, 189, 248, 0.3);
}

/* Footer */
.app-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: 16px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-subtle);
    margin-top: auto;
}