/* Modern Matte Design - pqpq.nl */

:root {
    /* Matte Modern Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --accent: #a78bfa;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;

    /* Neutral Matte Tones */
    --text: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    /* Background - Matte Dark */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;

    /* Glass Effect */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(148, 163, 184, 0.1);

    /* Shadows - Subtle */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    /* Dark mode already set as default in :root */
}

[data-theme="light"] {
    /* Light mode overrides */
    --text: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;

    /* Background - Light */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(148, 163, 184, 0.2);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

/* Subtle Matte Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

[data-theme="light"] body::before {
    background:
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.015) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.015) 0%, transparent 50%);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 24px;
    position: relative;
    z-index: 1;
}

/* ==================== HEADER ==================== */
header {
    text-align: center;
    margin-bottom: 60px;
    padding: 0 20px;
}

header h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 32px;
}

/* Navigation Tabs */
.header-nav {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 32px;
}

.nav-btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.nav-btn:hover {
    border-color: var(--primary);
    color: var(--text);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ==================== THEME TOGGLE ==================== */
.theme-toggle-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 1000;
}

.theme-toggle {
    width: 68px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.3s ease;
}

.toggle-track {
    width: 100%;
    height: 100%;
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 2px solid rgba(148, 163, 184, 0.2);
    border-radius: 18px;
    position: relative;
    transition: all 0.3s ease;
}

[data-theme="light"] .toggle-track {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(148, 163, 184, 0.3);
}

.toggle-thumb {
    position: absolute;
    left: 2px;
    top: 2px;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .toggle-thumb {
    left: calc(100% - 30px);
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
}

.toggle-icon {
    font-size: 16px;
    line-height: 1;
}

.theme-toggle:hover .toggle-track {
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.2);
}

.theme-toggle:hover .toggle-thumb {
    transform: scale(1.1);
}

/* ==================== CARDS - GLASSMORPHISM ==================== */
.main-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 48px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.main-card:hover {
    border-color: rgba(148, 163, 184, 0.2);
    box-shadow: var(--shadow-lg);
}

.main-card h2 {
    color: var(--text);
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 32px;
    letter-spacing: -0.01em;
}

.main-card > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1rem;
}

/* ==================== FORMS ==================== */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
    letter-spacing: 0.01em;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    background: var(--bg-tertiary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Advanced Options */
.options-toggle {
    margin-bottom: 24px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-light);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.btn-link:hover {
    color: var(--primary);
}

.advanced-options {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
}

/* UTM Builder */
.utm-builder {
    display: grid;
    gap: 12px;
}

.qr-color-picker {
    display: flex;
    align-items: center;
    gap: 12px;
}

.qr-color-picker input[type="color"] {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    background: transparent;
}

/* ==================== BUTTONS ==================== */
.btn-primary,
.btn-secondary,
.btn-copy {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
}

.btn-copy {
    background: var(--success);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-copy:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

/* ==================== LOADING SPINNER ==================== */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== RESULT DISPLAY ==================== */
.result {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 16px;
    padding: 32px;
    margin-top: 32px;
}

.result h3 {
    color: var(--success);
    margin-bottom: 20px;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.short-url-display {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.short-url-display input {
    flex: 1;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--success);
    border-radius: 12px;
    color: var(--text);
    font-weight: 600;
    font-size: 15px;
}

.qr-code {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(16, 185, 129, 0.2);
}

.qr-code p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.qr-code img,
.qr-code canvas,
#qrcode {
    max-width: 200px;
    margin: 0 auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

/* ==================== TOAST NOTIFICATIONS ==================== */
.toast-container {
    position: fixed;
    top: 90px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    min-width: 320px;
    padding: 16px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.3s ease;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }

.toast-icon {
    font-size: 20px;
}

.toast-message {
    flex: 1;
    color: var(--text);
    font-size: 0.9rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 20px;
    padding: 0;
    width: 24px;
    height: 24px;
    transition: var(--transition);
}

.toast-close:hover {
    color: var(--text);
}

/* ==================== STATS ==================== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    border-color: rgba(148, 163, 184, 0.2);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ==================== FEATURES ==================== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.feature {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: var(--transition);
}

.feature:hover {
    transform: translateY(-4px) scale(1.02);
    border-color: rgba(148, 163, 184, 0.2);
    box-shadow: var(--shadow-lg);
}

.feature h3 {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.feature p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ==================== FOOTER ==================== */
footer {
    text-align: center;
    color: var(--text-secondary);
    margin-top: 60px;
    padding: 24px;
}

footer a {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

footer a:hover {
    color: var(--primary);
}

/* ==================== KEYBOARD HINT ==================== */
.keyboard-hint {
    position: fixed;
    bottom: 24px;
    left: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    box-shadow: var(--shadow-md);
}

.keyboard-hint kbd {
    background: var(--bg-secondary);
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid var(--glass-border);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.8rem;
    color: var(--text);
}

/* ==================== BULK RESULTS ==================== */
.bulk-results {
    margin-top: 24px;
}

.bulk-results .result-item {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ==================== HISTORY ==================== */
.history-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.history-controls input {
    flex: 1;
    min-width: 200px;
}

.history-list {
    margin-top: 24px;
}

.history-list .loading {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

/* ==================== API DOCS ==================== */
.api-info pre {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
}

.api-info code {
    color: var(--primary-light);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

.api-info h3 {
    color: var(--text);
    margin-top: 32px;
    margin-bottom: 16px;
    font-size: 1.25rem;
}

.api-info a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
}

.api-info a:hover {
    color: var(--primary);
    text-decoration: underline;
}

.api-endpoints {
    list-style: none;
    padding: 0;
}

.api-endpoints li {
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 8px;
    border-left: 3px solid var(--primary);
}

.api-endpoints strong {
    color: var(--primary-light);
    font-family: monospace;
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ==================== UTILITY CLASSES ==================== */
.hidden {
    display: none !important;
}

.section-content {
    display: block;
}

.section-content.hidden {
    display: none;
}

/* URL Preview */
.url-preview {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .container {
        padding: 40px 20px;
    }

    header h1 {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .main-card {
        padding: 32px 24px;
        border-radius: 20px;
    }

    .short-url-display {
        flex-direction: column;
    }

    .btn-copy {
        width: 100%;
    }

    .theme-toggle-container {
        top: 16px;
        right: 16px;
    }

    .theme-toggle {
        width: 60px;
        height: 32px;
    }

    .toggle-thumb {
        width: 24px;
        height: 24px;
    }

    [data-theme="light"] .toggle-thumb {
        left: calc(100% - 26px);
    }

    .toggle-icon {
        font-size: 14px;
    }

    .keyboard-hint {
        display: none;
    }

    .stats,
    .features {
        grid-template-columns: 1fr;
    }

    .header-nav {
        gap: 6px;
    }

    .nav-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .history-controls {
        flex-direction: column;
    }

    .history-controls input {
        width: 100%;
    }

    .toast-container {
        top: 70px;
        right: 16px;
        left: 16px;
    }

    .toast {
        min-width: auto;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .main-card {
        padding: 24px 20px;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}