/* letmein - iOS-Style Minimal Design System */

:root {
    /* Colors - iOS Light Theme */
    --color-bg: #f2f2f7;
    --color-card: #ffffff;
    --color-card-secondary: #f9f9fb;
    --color-text: #1c1c1e;
    --color-text-secondary: #8e8e93;
    --color-text-tertiary: #aeaeb2;
    --color-border: #e5e5ea;
    --color-border-light: #f2f2f7;

    /* Accent Colors */
    --color-primary: #007aff;
    --color-primary-hover: #0056b3;
    --color-success: #34c759;
    --color-warning: #ff9500;
    --color-danger: #ff3b30;
    --color-info: #5856d6;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 64px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #000000;
        --color-card: #1c1c1e;
        --color-card-secondary: #2c2c2e;
        --color-text: #ffffff;
        --color-text-secondary: #8e8e93;
        --color-text-tertiary: #636366;
        --color-border: #38383a;
        --color-border-light: #2c2c2e;
    }
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

/* Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-card);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-logo svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--space-lg);
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.nav-link.active {
    background: var(--color-primary);
    color: white;
}

.nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--topbar-height);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    position: sticky;
    top: 0;
    z-index: 50;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.content {
    flex: 1;
    padding: var(--space-lg);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-card-secondary);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stat-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: var(--space-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.stat-icon.primary { background: rgba(0, 122, 255, 0.1); color: var(--color-primary); }
.stat-icon.success { background: rgba(52, 199, 89, 0.1); color: var(--color-success); }
.stat-icon.warning { background: rgba(255, 149, 0, 0.1); color: var(--color-warning); }
.stat-icon.danger { background: rgba(255, 59, 48, 0.1); color: var(--color-danger); }
.stat-icon.info { background: rgba(88, 86, 214, 0.1); color: var(--color-info); }

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-family);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

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

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

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

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

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

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

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
}

.btn-icon {
    padding: var(--space-sm);
    background: transparent;
    color: var(--color-text-secondary);
}

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

/* Forms */
.form-group {
    margin-bottom: var(--space-lg);
}

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

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

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

.table th,
.table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

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

.table tbody tr:hover {
    background: var(--color-card-secondary);
}

.table td {
    font-size: 0.9375rem;
    color: var(--color-text);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 999px;
}

.badge-success {
    background: rgba(52, 199, 89, 0.15);
    color: var(--color-success);
}

.badge-danger {
    background: rgba(255, 59, 48, 0.15);
    color: var(--color-danger);
}

.badge-warning {
    background: rgba(255, 149, 0, 0.15);
    color: var(--color-warning);
}

.badge-info {
    background: rgba(88, 86, 214, 0.15);
    color: var(--color-info);
}

.badge-secondary {
    background: var(--color-bg);
    color: var(--color-text-secondary);
}

/* License Key Display */
.license-key {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.license-key-copy {
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.license-key-copy:hover {
    color: var(--color-primary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.empty-state-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

/* Alerts / Toast */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.alert svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.alert-success {
    background: rgba(52, 199, 89, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(52, 199, 89, 0.2);
}

.alert-danger {
    background: rgba(255, 59, 48, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.alert-warning {
    background: rgba(255, 149, 0, 0.1);
    color: var(--color-warning);
    border: 1px solid rgba(255, 149, 0, 0.2);
}

/* Detail Page */
.detail-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.detail-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--space-sm) 0;
}

.detail-subtitle {
    color: var(--color-text-secondary);
}

.detail-actions {
    display: flex;
    gap: var(--space-sm);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.detail-section {
    margin-bottom: var(--space-xl);
}

.detail-section-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.detail-value {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    padding: var(--space-lg);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    padding: var(--space-xl);
}

.login-logo {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-logo svg {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin: var(--space-md) 0 var(--space-xs);
}

.login-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.pagination-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    background: var(--color-card);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--color-bg);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

/* Utilities */
.text-mono {
    font-family: var(--font-mono);
}

.text-muted {
    color: var(--color-text-secondary);
}

.text-success {
    color: var(--color-success);
}

.text-danger {
    color: var(--color-danger);
}

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

.mt-md {
    margin-top: var(--space-md);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.flex {
    display: flex;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

/* Chart Styles - Line Chart */
.line-chart-container {
    position: relative;
}

.line-chart {
    width: 100%;
    height: 220px;
    overflow: visible;
}

.chart-grid line {
    stroke: var(--color-border);
    stroke-width: 1;
    stroke-dasharray: 4, 4;
}

.chart-y-labels text {
    font-size: 11px;
    fill: var(--color-text-tertiary);
    text-anchor: end;
    dominant-baseline: middle;
}

.chart-x-labels text {
    font-size: 11px;
    fill: var(--color-text-secondary);
    text-anchor: middle;
    font-weight: 500;
}

.chart-area {
    fill: rgba(52, 199, 89, 0.1);
    opacity: 0;
    transition: opacity 0.8s ease;
}

.chart-area.animate {
    opacity: 1;
}

.chart-area-success {
    fill: url(#successGradient);
    fill: rgba(52, 199, 89, 0.15);
}

.chart-line {
    fill: none;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 1.5s ease-out;
}

.chart-line.animate {
    stroke-dashoffset: 0;
}

.chart-line-success {
    stroke: var(--color-success);
    filter: drop-shadow(0 2px 4px rgba(52, 199, 89, 0.3));
}

.chart-line-danger {
    stroke: var(--color-danger);
    stroke-width: 2;
    stroke-dasharray: 6, 4;
    filter: drop-shadow(0 2px 4px rgba(255, 59, 48, 0.3));
}

.chart-points circle {
    opacity: 0;
    transform: scale(0);
    transform-origin: center;
    transform-box: fill-box;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.chart-points.animate circle {
    opacity: 1;
    transform: scale(1);
}

.chart-points.animate circle:nth-child(1) { transition-delay: 0.2s; }
.chart-points.animate circle:nth-child(2) { transition-delay: 0.4s; }
.chart-points.animate circle:nth-child(3) { transition-delay: 0.6s; }
.chart-points.animate circle:nth-child(4) { transition-delay: 0.8s; }
.chart-points.animate circle:nth-child(5) { transition-delay: 1.0s; }
.chart-points.animate circle:nth-child(6) { transition-delay: 1.2s; }
.chart-points.animate circle:nth-child(7) { transition-delay: 1.4s; }

.chart-points-success circle {
    fill: var(--color-success);
    stroke: var(--color-card);
    stroke-width: 2;
}

.chart-points-success circle:hover {
    r: 7;
    cursor: pointer;
}

.chart-points-danger circle {
    fill: var(--color-danger);
    stroke: var(--color-card);
    stroke-width: 2;
}

.chart-points-danger circle:hover {
    r: 6;
    cursor: pointer;
}

.chart-stats {
    display: flex;
    gap: var(--space-md);
}

.chart-stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.chart-stat-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.chart-stat-dot.success {
    background: var(--color-success);
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.legend-success {
    background: var(--color-success);
}

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

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }

    .main-content {
        margin-left: 220px;
    }

    :root {
        --sidebar-width: 220px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        transform: translateX(-100%);
        width: var(--sidebar-width);
        z-index: 1000;
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
    }

    .stat-card {
        padding: var(--space-md);
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .stat-icon {
        width: 40px;
        height: 40px;
    }

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

    .line-chart {
        height: 180px;
    }

    .chart-legend {
        gap: var(--space-md);
    }

    .content {
        padding: var(--space-md);
    }

    .topbar {
        padding: 0 var(--space-md);
    }

    .page-title {
        font-size: 1.125rem;
    }

    .card-header {
        padding: var(--space-md);
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .card-body {
        padding: var(--space-md);
    }

    .chart-stats {
        display: none;
    }

    .table th,
    .table td {
        padding: var(--space-sm);
        font-size: 0.8125rem;
    }

    .license-key {
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-sm);
    }

    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.875rem;
    }

    .btn-sm {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.75rem;
    }
}

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

    .stat-card {
        padding: var(--space-sm);
    }

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

    .stat-label {
        font-size: 0.75rem;
    }

    .stat-icon {
        width: 32px;
        height: 32px;
        margin-bottom: var(--space-sm);
    }

    .stat-icon svg {
        width: 18px;
        height: 18px;
    }

    .line-chart {
        height: 160px;
    }

    .chart-y-labels text {
        font-size: 9px;
    }

    .chart-x-labels text {
        font-size: 9px;
    }

    .chart-line {
        stroke-width: 2;
    }

    .chart-points-success circle {
        r: 4;
    }

    .chart-points-danger circle {
        r: 3;
    }

    .chart-legend {
        gap: var(--space-sm);
        flex-wrap: wrap;
        justify-content: center;
    }

    .legend-item {
        font-size: 11px;
    }

    .legend-color {
        width: 10px;
        height: 10px;
    }

    .card-title {
        font-size: 1rem;
    }

    .detail-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .detail-value {
        font-size: 0.875rem;
    }

    .table-container {
        margin: 0 calc(-1 * var(--space-md));
    }

    .table th:nth-child(n+3),
    .table td:nth-child(n+3) {
        display: none;
    }

    .empty-state {
        padding: var(--space-lg);
    }

    .empty-state svg {
        width: 48px;
        height: 48px;
    }
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    padding: var(--space-sm);
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Mobile overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* Touch friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px;
    }

    .nav-link {
        min-height: 48px;
    }

    .form-input,
    .form-select,
    .form-textarea {
        min-height: 44px;
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .table th,
    .table td {
        padding: var(--space-md) var(--space-sm);
    }

    .license-key-copy {
        padding: var(--space-sm);
        margin: calc(-1 * var(--space-sm));
    }

    .chart-points circle {
        r: 8;
    }
}