/* ============================================
   MasterPen Admin Panel - Styles
   Modern, Responsive, Mobile-Friendly
   ============================================ */

/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #6366f1;
    --secondary: #6b7280;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f9fafb;
    --surface: #ffffff;
    --border: #e5e7eb;
    --text: #1f2937;
    --text-light: #6b7280;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
    --radius: 0.5rem;
    --radius-sm: 0.375rem;
    --spacing: 0.75rem;
}

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

body {
    font-family: 'Saira', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    font-size: 14px;
}

/* ============================================
   Login Page
   ============================================ */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 0.375rem;
}

.login-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem var(--spacing);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.375rem 0.625rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.1);
}

.nav-link.active {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.1);
}

/* ============================================
   Layout
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing);
}

.page-header {
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.page-title {
    font-size: 1.375rem;
    font-weight: 600;
    margin: 0;
    color: var(--text);
}

.page-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.375rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="tel"],
.form-group input[type="url"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    background: var(--surface);
    color: var(--text);
    transition: all 0.2s;
}

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

.form-group input[type="file"] {
    width: 100%;
    padding: 0.5rem;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    cursor: pointer;
    transition: all 0.2s;
}

.form-group input[type="file"]:hover {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.05);
}

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

.cover-preview {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.cover-preview img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary), #7c3aed);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-btn.active,
.filter-btn.btn-primary {
    background: linear-gradient(to right, var(--primary), #7c3aed);
    color: white;
}

/* Author earnings table styling */
#author-earnings-section table td {
    vertical-align: middle;
}

#author-earnings-section table td strong {
    color: var(--text);
    font-weight: 600;
}

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

.btn-secondary:hover:not(:disabled) {
    background: #4b5563;
    transform: translateY(-1px);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text);
}

/* ============================================
   Grid System
   ============================================ */
.grid {
    display: grid;
    gap: 0.75rem;
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================
   Stats Cards
   ============================================ */
.stat-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, var(--primary), #7c3aed);
    opacity: 0.6;
}

.stat-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.375rem;
    font-weight: 500;
    text-transform: none;
    letter-spacing: normal;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

thead {
    background: var(--bg);
}

th {
    padding: 0.625rem 0.75rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    text-transform: none;
    letter-spacing: normal;
}

td {
    padding: 0.625rem 0.75rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.8125rem;
}

tbody tr {
    transition: background 0.2s;
}

tbody tr:hover {
    background: var(--bg);
}

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

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: none;
    letter-spacing: normal;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

/* ============================================
   Messages
   ============================================ */
.error-message {
    background: #fee2e2;
    border: 1px solid #fca5a5;
    color: #991b1b;
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
}

.success-message {
    background: #d1fae5;
    border: 1px solid #86efac;
    color: #065f46;
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
}

/* ============================================
   Loading
   ============================================ */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
}

.loading-spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner {
    display: inline-block;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

@media (max-width: 768px) {
    :root {
        --spacing: 0.75rem;
    }

    .container {
        padding: var(--spacing);
    }

    .nav {
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
    }

    .nav-title {
        text-align: center;
        margin-bottom: 0.5rem;
    }

    .nav-links {
        justify-content: center;
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.8125rem;
        padding: 0.5rem;
    }

    .page-title {
        font-size: 1.25rem;
    }

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

    .stat-value {
        font-size: 1.375rem;
    }

    .table-container {
        border-radius: var(--radius-sm);
    }

    table {
        font-size: 0.875rem;
    }

    th, td {
        padding: 0.5rem 0.375rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

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

    .page-actions .btn {
        width: 100%;
    }

    .login-card {
        padding: 1.5rem 1.25rem;
    }

    .card {
        padding: 0.875rem;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.125rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* ============================================
   Utilities
   ============================================ */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 0.75rem; }
.mt-6 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 0.75rem; }
.mb-6 { margin-bottom: 1rem; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.hidden { display: none; }

/* ============================================
   File Input Styling
   ============================================ */
input[type="file"] {
    cursor: pointer;
}

input[type="file"]::file-selector-button {
    padding: 0.375rem 0.75rem;
    margin-right: 0.75rem;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--primary);
    color: white;
    font-weight: 500;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.2s;
}

input[type="file"]::file-selector-button:hover {
    background: var(--primary-dark);
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .nav,
    .page-actions,
    .btn {
        display: none;
    }
}