/* LME - Modern Developer UI
 *
 * A clean, modern interface inspired by developer tools like Railway and Vercel.
 * Features:
 * - Sidebar navigation with animated icons
 * - Modern sans-serif typography (Inter/SF Pro/Segoe UI)
 * - Dark theme with subtle color palette
 * - Framework-free (no Bootstrap, Tailwind, or Pico.css)
 * - Fully responsive design
 */

/* ============================================
   RESET & BASE
   ============================================ */

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

:root {
    /* Colors - Ultra Modern Dark Theme (inspired by premium dashboards) */
    --bg-primary: #1a1d29;
    --bg-secondary: #242838;
    --bg-tertiary: #2d3246;
    --bg-hover: #323749;
    --bg-card: #2a2d3a;

    --fg-primary: #e8eaed;
    --fg-secondary: #9ca3af;
    --fg-tertiary: #6b7280;

    --border-color: #3a3f52;
    --border-subtle: #2d3246;

    /* Modern Accent Colors - 2025 Palette (Purple-Centric) */
    --color-primary: #8b5cf6;    /* Violet - Primary brand color */
    --color-success: #10b981;    /* Emerald - Success states */
    --color-warning: #f59e0b;    /* Amber - Warnings */
    --color-danger: #ef4444;     /* Rose - Errors/danger */
    --color-info: #6366f1;       /* Indigo - Info states */

    /* Chart Accent Colors - Multi-hue palette */
    --color-pink: #ec4899;       /* Hot Pink */
    --color-teal: #14b8a6;       /* Teal */
    --color-violet: #8b5cf6;     /* Violet (alias) */
    --color-amber: #f59e0b;      /* Amber (alias) */

    /* Status Colors - Modern & Vibrant */
    --status-success: #10b981;   /* Emerald */
    --status-warning: #f59e0b;   /* Amber */
    --status-error: #ef4444;     /* Rose */
    --status-info: #8b5cf6;      /* Violet */
    --status-neutral: #9ca3af;   /* Gray */

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.5rem;

    /* Layout */
    --sidebar-width: 180px;
    --topbar-height: 50px;
}

html {
    font-size: 16px;
}

body {
    font-family: 'Inter', 'SF Pro Display', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--fg-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   LAYOUT - SIDEBAR + MAIN
   ============================================ */

body {
    display: flex;
    min-height: 100vh;
}

nav {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

nav .brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 700;
    color: var(--fg-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    cursor: pointer;
    user-select: none;
    text-decoration: none;
    transition: all 0.2s;
}

nav .brand:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: var(--status-info);
}

nav .brand-icon {
    font-size: 1.25rem;
    color: var(--status-info);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: inline-block;
}

nav .brand:hover .brand-icon {
    transform: rotate(180deg) scale(1.1);
    color: var(--status-success);
}

nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

nav li {
    display: block;
}

nav a {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    color: var(--fg-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    border-radius: 4px;
    transition: all 0.15s;
}

nav .nav-icon {
    font-size: 1rem;
    color: var(--fg-tertiary);
    opacity: 0.6;
    transition: all 0.15s;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

nav a:hover {
    background: var(--bg-hover);
    color: var(--fg-primary);
}

nav a:hover .nav-icon {
    opacity: 1;
    color: var(--fg-secondary);
}

nav a.active {
    background: var(--bg-tertiary);
    color: var(--fg-primary);
}

nav a.active .nav-icon {
    opacity: 1;
    color: var(--status-info);
}

nav .badge {
    font-size: 0.6875rem;
    padding: 0.125rem 0.375rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    color: var(--fg-tertiary);
    font-weight: 500;
    margin-left: auto;
}

main {
    flex: 1;
    padding: var(--space-xl);
    overflow-y: auto;
}

footer {
    margin-top: auto;
    padding-top: var(--space-xl);
    color: var(--fg-tertiary);
    font-size: 0.75rem;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--fg-primary);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--fg-primary);
    margin: var(--space-xl) 0 var(--space-md) 0;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--fg-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: var(--space-xs);
}

p {
    margin: var(--space-md) 0;
    color: var(--fg-secondary);
}

small {
    font-size: 0.75rem;
    color: var(--fg-tertiary);
    display: block;
    margin-top: var(--space-xs);
}

code, .mono {
    font-family: 'SF Mono', 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 0.8125rem;
}

/* ============================================
   STATS CARDS
   ============================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-lg);
    min-height: 240px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.chart-container:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.chart-container h2 {
    margin-top: 0;
    margin-bottom: var(--space-lg);
    font-size: 0.95rem;
    color: var(--fg-primary);
    font-weight: 600;
}

.chart-container canvas {
    max-height: 200px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    border-color: var(--border-subtle);
}

.stat-card h3 {
    font-size: 0.75rem;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fg-tertiary);
    font-weight: 600;
}

.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--fg-primary);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-card .label {
    font-size: 0.75rem;
    color: var(--fg-tertiary);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Modern colored stat cards - 2025 Gradient Overlays */
.stat-card.active {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.05) 100%);  /* Emerald */
    border-color: rgba(16, 185, 129, 0.2);
}

.stat-card.active .value {
    color: var(--color-success);
}

.stat-card.expired {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(245, 158, 11, 0.05) 100%);  /* Amber */
    border-color: rgba(245, 158, 11, 0.2);
}

.stat-card.expired .value {
    color: var(--color-warning);
}

.stat-card.revoked {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.05) 100%);  /* Rose */
    border-color: rgba(239, 68, 68, 0.2);
}

.stat-card.revoked .value {
    color: var(--color-danger);
}

.stat-card.cert-valid {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.05) 100%);  /* Emerald */
    border-color: rgba(16, 185, 129, 0.2);
}

.stat-card.cert-invalid {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.05) 100%);  /* Rose */
    border-color: rgba(239, 68, 68, 0.2);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(245, 158, 11, 0.05) 100%);  /* Amber */
    border-color: rgba(245, 158, 11, 0.2);
}

/* ============================================
   TABLES
   ============================================ */

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

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

th {
    text-align: left;
    padding: var(--space-sm) var(--space-md);
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--fg-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    color: var(--fg-primary);
}

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

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

/* ============================================
   STATUS BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    border-radius: 12px;
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: capitalize;
}

.badge.active {
    background: rgba(74, 222, 128, 0.1);
    color: var(--status-success);
}

.badge.expired {
    background: rgba(251, 191, 36, 0.1);
    color: var(--status-warning);
}

.badge.revoked {
    background: rgba(248, 113, 113, 0.1);
    color: var(--status-error);
}

.badge.suspended {
    background: rgba(156, 163, 175, 0.1);
    color: var(--status-neutral);
}

/* ============================================
   BUTTONS & LINKS
   ============================================ */

a {
    color: var(--status-info);
    text-decoration: none;
    transition: color 0.15s;
}

a:hover {
    color: var(--fg-primary);
    text-decoration: underline;
}

button,
[role="button"],
input[type="submit"] {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--fg-primary);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s;
}

button:hover,
[role="button"]:hover,
input[type="submit"]:hover {
    background: var(--bg-hover);
    border-color: var(--fg-tertiary);
    text-decoration: none;
}

button.primary,
input[type="submit"] {
    background: var(--status-info);  /* Violet */
    border-color: var(--status-info);
    color: #fff;
}

button.primary:hover,
input[type="submit"]:hover {
    background: #7c3aed;  /* Lighter violet on hover */
    border-color: #7c3aed;
}

button.secondary {
    background: transparent;
    color: var(--fg-secondary);
}

button.outline {
    background: transparent;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

button.danger {
    background: var(--status-error);
    border-color: var(--status-error);
    color: #fff;
}

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

/* ============================================
   FORMS
   ============================================ */

.form-grid {
    display: grid;
    gap: var(--space-lg);
    max-width: 600px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--fg-secondary);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

input,
select,
textarea {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--fg-primary);
    font-size: 0.875rem;
    font-family: inherit;
    transition: all 0.15s;
}

/* Remove default select styling (especially for Safari) */
select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8" viewBox="0 0 12 8"><path fill="%23a0a0a0" d="M6 8L0 0h12z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 8px;
    padding-right: 2.5rem;
    cursor: pointer;
}

select:hover {
    border-color: var(--fg-tertiary);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--status-info);
    background: var(--bg-tertiary);
}

input::placeholder,
textarea::placeholder {
    color: var(--fg-tertiary);
}

textarea {
    min-height: 120px;
    resize: vertical;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.8125rem;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left-width: 3px;
    border-radius: 6px;
    font-size: 0.8125rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.2s ease;
    z-index: 1000;
    max-width: 400px;
}

.toast.success {
    border-left-color: var(--status-success);
}

.toast.error {
    border-left-color: var(--status-error);
}

.toast.warning {
    border-left-color: var(--status-warning);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ============================================
   AUDIT LOG
   ============================================ */

.audit-log {
    max-height: 500px;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--space-md);
    font-size: 0.8125rem;
}

.audit-entry {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-subtle);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.75rem;
    line-height: 1.6;
}

.audit-entry:last-child {
    border-bottom: none;
}

.audit-entry strong {
    color: var(--fg-tertiary);
    font-weight: 400;
}

/* ============================================
   SCROLLBARS
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--fg-tertiary);
}

/* ============================================
   LOADING STATES
   ============================================ */

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--status-info);
    animation: spin 0.6s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.2s ease;
}

.loading-spinner {
    text-align: center;
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.loading-spinner .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--status-info);
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--space-md) auto;
}

.loading-spinner p {
    color: var(--fg-primary);
    margin: 0;
}

.inline-spinner {
    display: inline-block;
    margin-left: var(--space-sm);
    vertical-align: middle;
}

.inline-spinner .spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--fg-primary);
    animation: spin 0.6s linear infinite;
    display: inline-block;
}

.inline-spinner.small .spinner {
    width: 10px;
    height: 10px;
    border-width: 1px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* ============================================
   EMPTY & ERROR STATES
   ============================================ */

.empty-state,
.error-state {
    text-align: center;
    padding: var(--space-xl) * 3;
    color: var(--fg-secondary);
}

.empty-state .empty-icon,
.error-state .error-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state h3,
.error-state h3 {
    color: var(--fg-primary);
    margin-bottom: var(--space-sm);
}

.empty-state p,
.error-state p {
    max-width: 400px;
    margin: 0 auto var(--space-lg) auto;
}

.error-state {
    color: var(--status-error);
}

.error-state .error-icon {
    color: var(--status-error);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    :root {
        --sidebar-width: 60px;
    }

    nav {
        padding: var(--space-md);
    }

    nav .brand {
        font-size: 0.875rem;
    }

    nav a span:not(.badge) {
        display: none;
    }

    main {
        padding: var(--space-md);
    }

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

@media (max-width: 480px) {
    body {
        flex-direction: column;
    }

    :root {
        --sidebar-width: 100%;
    }

    nav {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    nav ul {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

/* ============================================
   FILTER BAR & SEARCH
   ============================================ */

.filter-bar {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    align-items: stretch;
}

.search-box {
    flex: 1;
}

.search-box input {
    width: 100%;
}

.filter-controls {
    display: flex;
    gap: var(--space-sm);
}

.filter-controls select {
    min-width: 150px;
}

.results-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding: var(--space-sm) 0;
    color: var(--fg-secondary);
    font-size: 0.8125rem;
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding: var(--space-lg) 0;
}

.pagination button {
    padding: var(--space-xs) var(--space-md);
    min-width: 36px;
}

.pagination button.active {
    background: var(--status-info);
    border-color: var(--status-info);
    color: #fff;
}

.pagination button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.pagination .page-info {
    color: var(--fg-secondary);
    font-size: 0.8125rem;
    padding: 0 var(--space-md);
}

/* ============================================
   LOGOUT BUTTON (Top Right)
   ============================================ */

.logout-button-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
}

.logout-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--fg-tertiary);
    font-size: 1.25rem;
    text-decoration: none;
    transition: all 0.2s ease;
    opacity: 0.6;
}

.logout-button:hover {
    color: var(--status-error);
    transform: rotate(90deg);
    opacity: 1;
    text-decoration: none;
}

.logout-text {
    display: none;
}


@keyframes flash {
    0%, 100% {
        background: transparent;
    }
    50% {
        background: rgba(96, 165, 250, 0.2);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

.stat-card .value {
    transition: all 0.3s ease;
}

/* ============================================
   UTILITIES
   ============================================ */

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

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

.text-warning {
    color: var(--status-warning);
}

.text-error {
    color: var(--status-error);
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* ============================================
   METRICS PAGE ENHANCEMENTS
   ============================================ */

/* Sort icons */
th .sort-icon {
    opacity: 0.3;
    margin-left: var(--space-xs);
    font-size: 0.75rem;
    transition: opacity 0.2s;
}

th:hover .sort-icon {
    opacity: 0.6;
}

th[data-sort] {
    user-select: none;
}

/* Spinning refresh icon */
#refresh-icon.loading {
    display: inline-block;
    animation: spin 1s linear infinite;
}

/* Better table hover */
#metrics-table tbody tr {
    transition: all 0.15s;
}

#metrics-table tbody tr:hover {
    background: var(--bg-hover);
    transform: translateX(2px);
}

/* Status badges with icons */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

/* Smooth filtering */
#metrics-table tbody tr {
    opacity: 1;
    transition: opacity 0.2s;
}

#metrics-table tbody tr[style*="display: none"] {
    opacity: 0;
}

/* Loading spinner in button */
button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}