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

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #6b7280;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #f9fafb;
    --card-bg: #ffffff;
    --text: #111827;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.header {
    margin-bottom: 32px;
    text-align: center;
}

.header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 24px;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    min-width: 120px;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Form */
.link-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group input:disabled {
    background-color: #f3f4f6;
    cursor: not-allowed;
}

.hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

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

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

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Buttons for toggle */
.toggle-clicks {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.9375rem;
    cursor: pointer;
    padding: 12px;
    display: block;
    margin: 16px auto;
    text-decoration: underline;
}

.toggle-clicks:hover {
    color: var(--primary-dark);
}

/* Search */
.search-bar {
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    max-width: 400px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9375rem;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Table */
.links-table {
    overflow-x: auto;
}

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

.links-table th,
.links-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.links-table th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: var(--bg);
}

.links-table tr:hover {
    background-color: var(--bg);
}

/* Table columns */
.id-col {
    width: 20%;
    font-family: 'SF Mono', Monaco, monospace;
}

.id-col code {
    background: var(--bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.875rem;
}

.url-col {
    width: 40%;
}

.url-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
}

.url-link:hover {
    text-decoration: underline;
}

.hits-col {
    width: 10%;
}

.hits-badge {
    display: inline-block;
    padding: 4px 10px;
    background: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
}

.date-col {
    width: 20%;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.actions-col {
    width: 10%;
}

/* Action buttons */
.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.action-btn:hover {
    background-color: var(--bg);
}

.action-btn edit {
    color: var(--warning);
}

.action-btn copy {
    color: var(--primary);
}

.action-btn delete {
    color: var(--danger);
}

.test-link {
    color: var(--text-muted);
    margin-left: 8px;
    vertical-align: middle;
}

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

/* Close button for cards */
.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    margin-left: auto;
}

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

/* Clicks list */
.clicks-list {
    max-height: 300px;
    overflow-y: auto;
}

.click-item {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.click-item:last-child {
    border-bottom: none;
}

.click-item code {
    background: var(--bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, monospace;
}

.click-time {
    color: var(--text-muted);
    min-width: 140px;
}

.click-ip {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-left: auto;
}

/* Empty message */
.empty-message {
    text-align: center;
    padding: 32px;
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    margin-top: 24px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    .stats-bar {
        gap: 16px;
    }

    .stat-item {
        min-width: 100px;
        padding: 12px 16px;
    }

    .links-table th,
    .links-table td {
        padding: 8px 12px;
    }

    .id-col {
        width: 25%;
    }

    .url-col {
        width: 35%;
    }

    .actions-col {
        width: 15%;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    animation: fadeIn 0.3s ease;
}

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

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

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

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

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    font-size: 0.9375rem;
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

.toast.success {
    background: var(--success);
}

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

.toast.info {
    background: var(--primary);
}

@keyframes slideUp {
    from { opacity: 0; transform: translate(-50%, 20px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}