/* ============================================
   AI Marketing SaaS — Design System
   Premium Dark Theme with Glassmorphism
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Variables ── */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #111127;
    --bg-card: rgba(17, 17, 39, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-active: rgba(255, 255, 255, 0.15);

    --text-primary: #f0f0f5;
    --text-secondary: #8b8ba7;
    --text-muted: #5a5a7a;

    --accent-purple: #667eea;
    --accent-violet: #764ba2;
    --accent-pink: #f093fb;
    --accent-blue: #4facfe;
    --accent-cyan: #00f2fe;
    --accent-green: #38ef7d;
    --accent-orange: #f7971e;
    --accent-red: #fc5c7d;

    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #38ef7d 0%, #11998e 100%);
    --gradient-warning: linear-gradient(135deg, #f7971e 0%, #ffd200 100%);
    --gradient-info: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-bg: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 50%, #0a0a1a 100%);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --sidebar-width: 260px;
    --header-height: 64px;

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

/* ── Reset & Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: var(--accent-purple); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-pink); }

img { max-width: 100%; height: auto; }

/* ── Layout ── */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-glass);
    padding: 1.5rem 0;
    overflow-y: auto;
    z-index: 100;
    transition: var(--transition);
}

.app-main {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    background: var(--gradient-bg);
}

.app-header {
    height: var(--header-height);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.app-content {
    padding: 2rem;
    max-width: 1400px;
}

/* ── Sidebar ── */
.sidebar-brand {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border-glass);
    margin-bottom: 1rem;
}

.sidebar-brand h1 {
    font-size: 1.2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-brand span {
    font-size: 1.4rem;
}

.sidebar-nav { list-style: none; }

.sidebar-nav .nav-section {
    padding: 0.8rem 1.5rem 0.4rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: var(--transition);
}

.sidebar-nav a:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
    border-left-color: var(--accent-purple);
}

.sidebar-nav a.active {
    background: rgba(102, 126, 234, 0.1);
    color: var(--accent-purple);
    border-left-color: var(--accent-purple);
}

.sidebar-nav a .nav-icon {
    font-size: 1.1rem;
    width: 22px;
    text-align: center;
}

/* ── Header ── */
.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-left h2 {
    font-size: 1.15rem;
    font-weight: 700;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.header-credits {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 0.4rem 1rem;
    font-size: 0.82rem;
    font-weight: 600;
}

.header-credits .credit-icon { color: var(--accent-orange); }
.header-credits .credit-count { color: var(--accent-green); }

.header-user {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.header-user:hover { background: var(--bg-glass-hover); }

.header-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: #fff;
}

.header-user-info .name { font-size: 0.82rem; font-weight: 600; }
.header-user-info .role { font-size: 0.68rem; color: var(--text-muted); text-transform: capitalize; }

/* ── Cards ── */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-glass-active);
    box-shadow: var(--shadow-glow);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
}

/* ── Stats Grid ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.stat-icon.purple { background: rgba(102, 126, 234, 0.15); color: var(--accent-purple); }
.stat-icon.pink { background: rgba(240, 147, 251, 0.15); color: var(--accent-pink); }
.stat-icon.blue { background: rgba(79, 172, 254, 0.15); color: var(--accent-blue); }
.stat-icon.green { background: rgba(56, 239, 125, 0.15); color: var(--accent-green); }
.stat-icon.orange { background: rgba(247, 151, 30, 0.15); color: var(--accent-orange); }

.stat-info .stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    line-height: 1;
}

.stat-info .stat-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4); color: #fff; }

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

.btn-success { background: var(--gradient-success); color: #fff; }
.btn-danger { background: rgba(252, 92, 125, 0.15); color: var(--accent-red); border: 1px solid rgba(252, 92, 125, 0.3); }
.btn-danger:hover { background: rgba(252, 92, 125, 0.25); }

.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-lg { padding: 0.8rem 2rem; font-size: 1rem; }

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

/* ── Forms ── */
.form-group {
    margin-bottom: 1.2rem;
}

.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { resize: vertical; min-height: 100px; }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b8ba7' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.88rem;
}

/* ── Tables ── */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glass);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-glass);
    font-size: 0.88rem;
}

.table th {
    background: var(--bg-glass);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tr:hover td { background: var(--bg-glass-hover); }

.table tr:last-child td { border-bottom: none; }

/* ── Badges ── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.65rem;
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-purple { background: rgba(102, 126, 234, 0.15); color: var(--accent-purple); }
.badge-green { background: rgba(56, 239, 125, 0.15); color: var(--accent-green); }
.badge-orange { background: rgba(247, 151, 30, 0.15); color: var(--accent-orange); }
.badge-red { background: rgba(252, 92, 125, 0.15); color: var(--accent-red); }
.badge-blue { background: rgba(79, 172, 254, 0.15); color: var(--accent-blue); }

/* ── Alerts / Flash Messages ── */
.alert {
    padding: 0.8rem 1.2rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.2rem;
    font-size: 0.88rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: slideDown 0.3s ease;
}

.alert-success { background: rgba(56, 239, 125, 0.1); border: 1px solid rgba(56, 239, 125, 0.3); color: var(--accent-green); }
.alert-error { background: rgba(252, 92, 125, 0.1); border: 1px solid rgba(252, 92, 125, 0.3); color: var(--accent-red); }
.alert-info { background: rgba(79, 172, 254, 0.1); border: 1px solid rgba(79, 172, 254, 0.3); color: var(--accent-blue); }
.alert-warning { background: rgba(247, 151, 30, 0.1); border: 1px solid rgba(247, 151, 30, 0.3); color: var(--accent-orange); }

/* ── Page Header ── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 800;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin-top: 0.2rem;
}

/* ── Grid Layouts ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ── AI Result Containers ── */
.ai-result {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-top: 1.5rem;
    animation: fadeInUp 0.4s ease;
}

.ai-result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-glass);
}

.ai-result-content {
    font-size: 0.92rem;
    line-height: 1.7;
    white-space: pre-wrap;
}

.ai-copy-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1.2rem;
    margin-bottom: 0.8rem;
    position: relative;
    transition: var(--transition);
}

.ai-copy-card:hover {
    border-color: var(--accent-purple);
}

.ai-copy-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.8rem;
}

/* ── Loading / Spinner ── */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-glass);
    border-top-color: var(--accent-purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(5px);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 1rem;
}

.loading-overlay.active { display: flex; }

.loading-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    animation: pulse 1.5s ease infinite;
}

/* ── Progress Bar ── */
.progress-bar {
    height: 8px;
    background: var(--bg-glass);
    border-radius: 50px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 50px;
    background: var(--gradient-primary);
    transition: width 0.5s ease;
}

/* ── Pricing Cards ── */
.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
    content: 'POPULAR';
    position: absolute;
    top: 1rem;
    right: -2rem;
    background: var(--gradient-primary);
    color: #fff;
    padding: 0.2rem 2.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    transform: rotate(45deg);
    letter-spacing: 1px;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin: 1rem 0;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    -webkit-text-fill-color: var(--text-muted);
}

.pricing-features {
    list-style: none;
    margin: 1.5rem 0;
    text-align: left;
}

.pricing-features li {
    padding: 0.4rem 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features li::before {
    content: '✓';
    color: var(--accent-green);
    font-weight: 700;
}

/* ── Image Gallery ── */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.image-gallery-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-glass);
    transition: var(--transition);
    position: relative;
}

.image-gallery-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.image-gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.image-gallery-item .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    padding: 1rem;
    opacity: 0;
    transition: var(--transition);
}

.image-gallery-item:hover .overlay { opacity: 1; }

/* ── Calendar Grid ── */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.calendar-day {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 0.8rem;
    min-height: 120px;
    transition: var(--transition);
}

.calendar-day:hover {
    border-color: var(--accent-purple);
}

.calendar-day .day-number {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent-purple);
    margin-bottom: 0.4rem;
}

.calendar-day .day-content {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ── Canvas Editor ── */
.editor-canvas-container {
    background: #1a1a2e;
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

.editor-toolbar {
    display: flex;
    gap: 0.5rem;
    padding: 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    flex-wrap: wrap;
}

.editor-toolbar .tool-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.editor-toolbar .tool-btn:hover,
.editor-toolbar .tool-btn.active {
    background: var(--accent-purple);
    color: #fff;
    border-color: var(--accent-purple);
}

/* ── Auth Pages ── */
.auth-page {
    min-height: 100vh;
    display: flex;
    background: var(--gradient-bg);
}

.auth-left {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-right {
    flex: 1;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.auth-right::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.08;
    top: -100px;
    right: -100px;
}

.auth-right::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--gradient-secondary);
    opacity: 0.06;
    bottom: -80px;
    left: -80px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo h1 {
    font-size: 1.8rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-logo p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.3rem;
}

.auth-form .form-control {
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
}

.auth-features {
    max-width: 400px;
    position: relative;
    z-index: 1;
}

.auth-features h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.auth-features .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
}

.auth-features .feature-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(102, 126, 234, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.auth-features .feature-text h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.auth-features .feature-text p {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* ── Template Cards ── */
.template-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.template-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-purple);
}

.template-preview {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.template-info {
    padding: 1rem;
    border-top: 1px solid var(--border-glass);
}

.template-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.template-info p {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* ── Shared Campaign Page ── */
.shared-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    background: var(--gradient-bg);
}

.shared-header {
    text-align: center;
    padding: 3rem 0;
}

.shared-header h1 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.shared-header .slogan {
    font-size: 1.2rem;
    color: var(--accent-purple);
    font-style: italic;
}

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

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(102, 126, 234, 0.2); }
    50% { box-shadow: 0 0 40px rgba(102, 126, 234, 0.4); }
}

.animate-fade { animation: fadeInUp 0.5s ease; }

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 0.88rem;
    margin-bottom: 1.2rem;
}

/* ── Modal ── */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(5px);
    z-index: 9000;
    justify-content: center;
    align-items: center;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: fadeInUp 0.3s ease;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

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

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 0.3rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 0.25rem;
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: none;
    font-family: inherit;
}

.tab:hover { color: var(--text-primary); }

.tab.active {
    background: var(--gradient-primary);
    color: #fff;
}

/* ── Tooltip ── */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border: 1px solid var(--border-glass);
}

[data-tooltip]:hover::after { opacity: 1; }

/* ── Responsive ── */
@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .app-sidebar {
        transform: translateX(-100%);
    }

    .app-sidebar.open {
        transform: translateX(0);
    }

    .app-main {
        margin-left: 0;
    }

    .app-content { padding: 1rem; }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .auth-page { flex-direction: column; }
    .auth-right { display: none; }

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

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .calendar-grid { grid-template-columns: 1fr; }
}

/* ── Utility Classes ── */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-sm { font-size: 0.82rem; }
.text-xs { font-size: 0.72rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.gap-1 { gap: 0.5rem; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.w-full { width: 100%; }
.hidden { display: none !important; }

.color-preview {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--border-glass);
    display: inline-block;
    vertical-align: middle;
}

/* ── Mobile Menu Toggle ── */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0.3rem;
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
}