/* C2PA Checker — Security-focused Dark Theme */
/* Professional security brand with cyan/blue tones */

:root {
    --accent: #06b6d4;
    --accent-dark: #0891b2;
    --accent-glow: rgba(6, 182, 212, 0.25);
    --accent-subtle: rgba(6, 182, 212, 0.08);
    --bg-dark: #0a0e14;
    --bg-card: #0f1419;
    --bg-card-hover: #151c24;
    --bg-surface: #111820;
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --text-muted: #484f58;
    --border-color: rgba(6, 182, 212, 0.15);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --danger: #f85149;
    --warning: #d29922;
    --success: #3fb950;
    --purple: #a855f7;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Subtle grid background */
.security-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(6, 182, 212, 0.08) 0%, transparent 70%),
        linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark) 100%);
}

/* Glow effects */
.glow {
    box-shadow: 0 0 20px var(--accent-glow);
}

.glow-text {
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Navigation */
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--accent);
    background: var(--accent-subtle);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--bg-dark);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 30px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent-subtle);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-color);
    background: rgba(255, 255, 255, 0.03);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.2s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-color);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 1.25rem;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--accent-subtle);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(6, 182, 212, 0.12);
    box-shadow: 0 0 40px var(--accent-glow), inset 0 0 40px var(--accent-glow);
}

.upload-zone.uploading {
    pointer-events: none;
    opacity: 0.7;
}

/* Loading spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Toast notifications */
.toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 0.75rem;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
    max-width: 400px;
    font-size: 0.875rem;
}

.toast-success {
    border-color: var(--success);
}

.toast-error {
    border-color: var(--danger);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* FAQ Styles */
details.card summary {
    list-style: none;
}

details.card summary::-webkit-details-marker {
    display: none;
}

details.card[open] {
    background: var(--bg-card-hover);
    border-color: var(--accent);
}

/* Pulse animation for shield icon */
@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 40px var(--accent-glow), 0 0 60px rgba(6, 182, 212, 0.15);
    }
}

.pulse-glow {
    animation: pulse-glow 3s ease-in-out infinite;
}

/* Responsive */
@media (max-width: 768px) {
    .upload-zone {
        padding: 2rem 1rem;
    }

    .card {
        padding: 1rem;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Gradient text utility */
.gradient-text {
    background: linear-gradient(135deg, var(--accent), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Mono font for technical data */
.font-mono {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}