/* === VARIABLES === */
:root {
    --primary: #2ecc71;
    --primary-dark: #27ae60;
    --secondary: #3498db;
    --danger: #e74c3c;
    --warning: #f39c12;
    --dark: #2c3e50;
    --darker: #1a252f;
    --light: #ecf0f1;
    --gray: #95a5a6;
    --border: rgba(255,255,255,0.1);
    --card-bg: rgba(30,40,50,0.95);
    --sidebar-width: 250px;
    --header-height: 60px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    color: #fff;
}

/* === HEADER === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--darker);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.logo-subtitle {
    font-size: 11px;
    color: var(--gray);
}

.header-nav {
    display: flex;
    gap: 20px;
}

.nav-link {
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.nav-link:hover {
    color: #fff;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-user span {
    color: var(--light);
    font-size: 14px;
}

.btn-logout {
    background: transparent;
    border: 1px solid var(--gray);
    color: var(--gray);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.btn-logout:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* === LAYOUT === */
.main-container {
    display: flex;
    padding-top: var(--header-height);
    min-height: 100vh;
}

/* === SIDEBAR === */
.sidebar {
    width: var(--sidebar-width);
    background: var(--darker);
    border-right: 1px solid var(--border);
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    padding: 20px 0;
    overflow-y: auto;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    color: var(--gray);
    text-decoration: none;
    font-size: 15px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-link:hover {
    background: rgba(255,255,255,0.05);
    color: #fff;
}

.sidebar-link.active {
    background: rgba(46, 204, 113, 0.1);
    color: var(--primary);
    border-left-color: var(--primary);
}

.sidebar-link .icon {
    font-size: 18px;
}

/* === CONTENT === */
.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 30px;
    max-width: 1000px;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.section h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #fff;
}

/* === CARDS === */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
}

.card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--light);
}

/* === FORMS === */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

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

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-size: 13px;
    color: var(--gray);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
    color: #fff;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 10px;
}

/* === BUTTONS === */
.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.15);
}

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

.btn-danger:hover {
    background: #c0392b;
}

.btn-small {
    padding: 8px 14px;
    font-size: 13px;
}

/* === SUBSCRIPTION CARD === */
.subscription-card {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.15), rgba(39, 174, 96, 0.1));
    border-color: var(--primary);
}

.subscription-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

.subscription-plan {
    display: flex;
    align-items: center;
    gap: 12px;
}

.plan-badge {
    background: var(--primary);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
}

.subscription-plan h2 {
    margin: 0;
    font-size: 24px;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-badge.active {
    background: rgba(46, 204, 113, 0.2);
    color: var(--primary);
}

.status-badge.cancelled {
    background: rgba(231, 76, 60, 0.2);
    color: var(--danger);
}

.status-badge.pending {
    background: rgba(243, 156, 18, 0.2);
    color: var(--warning);
}

.subscription-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-label {
    font-size: 13px;
    color: var(--gray);
}

.detail-value {
    font-size: 16px;
    font-weight: 500;
    color: #fff;
}

/* === FEATURES GRID === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    font-size: 13px;
}

.feature-item.enabled {
    color: var(--primary);
}

.feature-item.disabled {
    color: var(--gray);
    opacity: 0.6;
}

/* === PLANS GRID === */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.plan-card {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: all 0.2s;
}

.plan-card:hover {
    border-color: var(--primary);
}

.plan-card.current {
    border-color: var(--primary);
    background: rgba(46, 204, 113, 0.1);
}

.plan-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.plan-card .price {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.plan-card .price span {
    font-size: 14px;
    color: var(--gray);
    font-weight: 400;
}

/* === TABLE === */
.table-container {
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    font-size: 14px;
    color: var(--light);
}

.data-table tbody tr:hover {
    background: rgba(255,255,255,0.03);
}

/* === STATS === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    font-size: 32px;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}

.stat-label {
    font-size: 13px;
    color: var(--gray);
}

/* === USAGE BARS === */
.usage-bars {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.usage-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.usage-header {
    display: flex;
    justify-content: space-between;
}

.usage-name {
    font-size: 14px;
    font-weight: 500;
}

.usage-value {
    font-size: 13px;
    color: var(--gray);
}

.usage-bar {
    height: 8px;
    background: rgba(0,0,0,0.3);
    border-radius: 4px;
    overflow: hidden;
}

.usage-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* === ACTIVITY === */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
}

.activity-icon {
    width: 36px;
    height: 36px;
    background: rgba(46, 204, 113, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.activity-content {
    flex: 1;
}

.activity-text {
    font-size: 14px;
    color: #fff;
}

.activity-time {
    font-size: 12px;
    color: var(--gray);
}

/* === EMPTY STATE === */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--gray);
}

.empty-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 12px;
}

/* === DANGER ZONE === */
.danger-zone {
    border-color: var(--danger);
    background: rgba(231, 76, 60, 0.1);
}

.danger-zone h2 {
    color: var(--danger);
}

.danger-zone p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 14px;
}

/* === TOAST === */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--dark);
    color: #fff;
    padding: 14px 24px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 4px solid var(--primary);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

/* === MODAL === */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--dark);
    border-radius: 12px;
    padding: 24px;
    max-width: 400px;
    width: 90%;
}

.modal-content h3 {
    margin-bottom: 12px;
}

.modal-content p {
    color: var(--gray);
    margin-bottom: 20px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

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

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

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .content {
        margin-left: 0;
        padding: 20px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-group.full-width {
        grid-column: span 1;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .subscription-details {
        grid-template-columns: 1fr;
    }

    .features-grid,
    .plans-grid {
        grid-template-columns: 1fr;
    }
}