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

/* ===== ROOT VARIABLES ===== */
:root {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #6c757d;
    --text-muted: #8a8fa3;
    --border-color: #e9ecef;
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-hover: 0 8px 30px rgba(108, 99, 255, 0.12);
    --primary: #6C63FF;
    --primary-dark: #5A52D5;
    --secondary: #00D4AA;
    --danger: #FF6B6B;
    --radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== DARK THEME ===== */
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2333;
    --bg-input: #0d1117;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 30px rgba(108, 99, 255, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: var(--transition);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 10px; }

/* ===== NAVBAR ===== */
.navbar {
    background: var(--bg-secondary);
    padding: 12px 40px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.navbar .brand i {
    font-size: 26px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navbar .brand span {
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 8px;
}

.nav-links a:hover {
    color: var(--primary);
    background: rgba(108, 99, 255, 0.06);
}

.nav-links a.active {
    color: var(--primary);
    background: rgba(108, 99, 255, 0.08);
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: rotate(20deg);
}

/* ===== BUTTONS ===== */
.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(108, 99, 255, 0.35);
}

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

.btn-secondary:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
}

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

.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    border-radius: 8px;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

/* ===== STATS CARDS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 22px 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.stat-card .top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.stat-card .icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-card .icon.purple { background: rgba(108, 99, 255, 0.1); color: var(--primary); }
.stat-card .icon.green { background: rgba(0, 212, 170, 0.1); color: var(--secondary); }
.stat-card .icon.orange { background: rgba(255, 217, 61, 0.15); color: #F9A825; }
.stat-card .icon.red { background: rgba(255, 107, 107, 0.1); color: var(--danger); }

.stat-card .number {
    font-size: 28px;
    font-weight: 800;
    margin: 8px 0 2px;
    letter-spacing: -0.5px;
}

.stat-card .label {
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
}

/* ===== TABLES ===== */
.table-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

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

table thead th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-primary);
    border-bottom: 2px solid var(--border-color);
}

table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-primary);
}

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

/* ===== BADGES ===== */
.badge {
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    display: inline-block;
}

.badge-success { background: #d4edda; color: #155724; }
.badge-warning { background: #fff3cd; color: #856404; }
.badge-danger { background: #f8d7da; color: #721c24; }
.badge-primary { background: #e8e6ff; color: var(--primary); }

[data-theme="dark"] .badge-success { background: #1a3a2a; color: #6fcf97; }
[data-theme="dark"] .badge-warning { background: #3a2a1a; color: #f2c94a; }
[data-theme="dark"] .badge-danger { background: #3a1a1a; color: #f28b82; }
[data-theme="dark"] .badge-primary { background: #2a2a5a; color: #a78bfa; }

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    font-size: 13px;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
    background: var(--bg-input);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.06);
}

/* ===== AUTH PAGES ===== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6C63FF 0%, #a78bfa 60%, #00D4AA 100%);
    padding: 20px;
}

.auth-box {
    background: var(--bg-card);
    border-radius: 24px;
    padding: 44px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 25px 60px rgba(0,0,0,0.15);
}

.auth-box .logo {
    text-align: center;
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.auth-box .logo i {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-box .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 14px;
}

/* ===== CONTAINER ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px 32px;
}

/* ===== PAGE HEADER ===== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 24px 0 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h1 {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.page-header h1 i {
    margin-right: 8px;
}

.page-header p {
    color: var(--text-secondary);
    margin-top: 2px;
    font-size: 14px;
}

/* ===== ADMIN GRID ===== */
.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.admin-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-primary);
    text-align: center;
    border: 2px solid var(--border-color);
}

.admin-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.admin-card i {
    font-size: 36px;
    margin-bottom: 10px;
    display: block;
}

.admin-card h3 {
    font-size: 16px;
    margin-bottom: 4px;
    font-weight: 600;
}

.admin-card p {
    color: var(--text-secondary);
    font-size: 13px;
    margin: 0;
}

/* ===== MESSAGES ===== */
.msg-success {
    background: #d4edda;
    color: #155724;
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 18px;
    border-left: 4px solid #28a745;
}

.msg-error {
    background: #f8d7da;
    color: #721c24;
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 18px;
    border-left: 4px solid #dc3545;
}

[data-theme="dark"] .msg-success {
    background: #1a3a2a;
    color: #6fcf97;
    border-left-color: #6fcf97;
}

[data-theme="dark"] .msg-error {
    background: #3a1a1a;
    color: #f28b82;
    border-left-color: #f28b82;
}

/* ===== UPI BOX ===== */
.upi-box {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 24px;
    margin: 16px 0;
    border: 2px dashed var(--primary);
    text-align: center;
}

.upi-box .upi-id {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    font-family: 'Courier New', monospace;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 8px;
    display: inline-block;
    border: 1px solid var(--border-color);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar { padding: 10px 20px; }
    .navbar .brand { font-size: 20px; }
    .nav-links { gap: 4px; width: 100%; padding-top: 8px; border-top: 1px solid var(--border-color); }
    .nav-links a { font-size: 13px; padding: 4px 10px; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .stat-card { padding: 16px 18px; }
    .stat-card .number { font-size: 22px; }
    .auth-box { padding: 32px 24px; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 8px; }
    .page-header h1 { font-size: 22px; }
    .admin-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .admin-card { padding: 20px 16px; }
}

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