:root {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #0f172a;
    --border-color: #334155;
    --border-highlight: #38bdf8;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #38bdf8;
    --accent-indigo: #818cf8;
    --accent-purple: #c084fc;
    --accent-green: #34d399;
    --accent-amber: #fbbf24;
    --accent-red: #f87171;
    --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.15);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.4rem;
    color: #fff;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.logo-title {
    font-size: 1.35rem;
    font-weight: 700;
    background: linear-gradient(90deg, #ffffff, var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Layout Containers */
.main-container {
    max-width: 1300px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 2rem;
}

@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }
}

/* Cards & Panels */
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    margin-bottom: 2rem;
    transition: border-color 0.3s ease;
}

.panel:hover {
    border-color: rgba(56, 189, 248, 0.4);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.panel-title {
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
}

.panel-title i {
    color: var(--accent-blue);
}

/* Form Controls */
.form-group {
    margin-bottom: 1.35rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
}

/* Date Preset Buttons */
.preset-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btn-preset {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-preset:hover, .btn-preset.active {
    background: var(--accent-blue);
    color: #000;
    border-color: var(--accent-blue);
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.25 ease;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
    color: #fff;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
}

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

.btn-secondary:hover {
    background: #475569;
}

.btn-success {
    background: linear-gradient(135deg, var(--accent-green), #059669);
    color: #fff;
}

.btn-danger {
    background: rgba(248, 113, 113, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(248, 113, 113, 0.3);
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-danger:hover {
    background: var(--accent-red);
    color: #fff;
}

/* Generated Link Box */
.generated-link-box {
    background: rgba(15, 23, 42, 0.8);
    border: 1px dashed var(--accent-blue);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-top: 1.5rem;
}

.url-display {
    font-family: monospace;
    font-size: 0.88rem;
    word-break: break-all;
    color: var(--accent-blue);
    background: #090d16;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin: 0.75rem 0;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* Format Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-IMAGE { background: rgba(56, 189, 248, 0.2); color: var(--accent-blue); border: 1px solid rgba(56, 189, 248, 0.4); }
.badge-VIDEO { background: rgba(192, 132, 252, 0.2); color: var(--accent-purple); border: 1px solid rgba(192, 132, 252, 0.4); }
.badge-TEXT { background: rgba(251, 191, 36, 0.2); color: var(--accent-amber); border: 1px solid rgba(251, 191, 36, 0.4); }
.badge-ALL { background: rgba(52, 211, 153, 0.2); color: var(--accent-green); border: 1px solid rgba(52, 211, 153, 0.4); }

/* Saved Advertisers List */
.advertiser-card {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
}

.advertiser-card:hover {
    border-color: var(--accent-indigo);
    transform: translateX(4px);
}

.adv-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.adv-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.adv-id {
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--accent-blue);
    background: rgba(56, 189, 248, 0.1);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.25rem;
    display: inline-block;
}

.adv-meta {
    display: flex;
    gap: 0.5rem;
    margin: 0.75rem 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.adv-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.toast {
    background: var(--bg-card);
    border-left: 4px solid var(--accent-blue);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    margin-top: 0.5rem;
    color: #fff;
    font-size: 0.9rem;
    animation: slideIn 0.3s ease forwards;
}

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

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}