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

/* ═══════════════════════════════════════════
   CSS DESIGN SYSTEM — MITRASH DASHBOARD
   ═══════════════════════════════════════════ */

:root {
    /* Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2035;
    --bg-card-hover: #1f2a45;
    --bg-input: #0f1629;
    --border: #1e293b;
    --border-focus: #6366f1;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.12);

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;

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

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);
}

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

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

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

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

/* ═══ SIDEBAR ═══ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-brand {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), #a855f7);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.brand-text h1 {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-text span {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    user-select: none;
}

.nav-item:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.1));
    color: var(--accent-hover);
    border-color: rgba(99,102,241,0.2);
}

.nav-item .icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--accent);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
    min-width: 22px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
}

.sidebar-footer .nav-item {
    color: var(--text-muted);
    font-size: 13px;
}

/* ═══ MAIN CONTENT ═══ */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.page-header {
    padding: 28px 32px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(16px);
}

.page-header h2 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.page-header p {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

.page-body {
    padding: 28px 32px;
}

/* ═══ CARDS ═══ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: rgba(99,102,241,0.2);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 24px;
}

/* ═══ STAT CARDS ═══ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), #a855f7);
    opacity: 0;
    transition: opacity 0.3s;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: rgba(99,102,241,0.3);
    box-shadow: var(--shadow-glow);
}

.stat-card:hover::before { opacity: 1; }

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}

.stat-icon.purple { background: rgba(99,102,241,0.15); color: var(--accent); }
.stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-icon.orange { background: var(--warning-bg); color: var(--warning); }
.stat-icon.blue { background: var(--info-bg); color: var(--info); }
.stat-icon.red { background: var(--danger-bg); color: var(--danger); }

.stat-value {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

/* ═══ FORMS ═══ */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

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

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

.form-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-label .required {
    color: var(--danger);
}

.form-input,
.form-textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    transition: all 0.2s ease;
    outline: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
}

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
}

/* ═══ BUTTONS ═══ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    white-space: nowrap;
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-danger:hover {
    background: var(--danger-bg);
}

.btn-ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-sm);
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ═══ SCHOOLS GRID ═══ */
.schools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 12px;
}

.school-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.school-card:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.school-card.selected {
    border-color: var(--accent);
    background: rgba(99,102,241,0.1);
}

.school-checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s;
    font-size: 13px;
    color: transparent;
}

.school-card.selected .school-checkbox {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.school-info {
    flex: 1;
    min-width: 0;
}

.school-name {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.school-code {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ═══ INSTANCES ═══ */
.instance-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

@media (max-width: 600px) {
    .instance-list {
        grid-template-columns: 1fr;
    }
}

.instance-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.instance-card:hover {
    border-color: rgba(99,102,241,0.2);
}

.instance-header {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.instance-status {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.instance-status.running {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2s infinite;
}

.instance-status.stopped {
    background: var(--text-muted);
}

.instance-status.error {
    background: var(--danger);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.instance-info { flex: 1; }

.instance-name {
    font-size: 16px;
    font-weight: 600;
}

.instance-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 3px;
    display: flex;
    gap: 16px;
}

.instance-actions {
    display: flex;
    gap: 8px;
}

.instance-logs {
    background: var(--bg-input);
    border-top: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.instance-logs.expanded {
    max-height: 500px;
}

.log-viewer-header {
    padding: 8px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 600;
}

.log-container {
    padding: 12px 16px;
    max-height: 450px;
    overflow-y: auto;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
    scrollbar-gutter: stable;
}

.log-container .log-line,
.log-container-fullscreen .log-line {
    padding: 6px 12px;
    border-radius: 6px;
    margin-bottom: 4px;
    border-left: 3px solid #334155;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    background: #0f172a;
    transition: all 0.2s ease;
    word-break: break-all;
}

.log-container .log-line:hover,
.log-container-fullscreen .log-line:hover {
    background: #1e293b;
}

.log-time {
    color: #64748b;
    font-size: 12px;
    margin-right: 10px;
    user-select: none;
    flex-shrink: 0;
}

.log-text {
    color: #e2e8f0;
}

.log-line.error {
    background: rgba(239, 68, 68, 0.08);
    border-left-color: var(--danger);
}
.log-line.error .log-text { color: #fca5a5; }

.log-line.warning {
    background: rgba(245, 158, 11, 0.08);
    border-left-color: var(--warning);
}
.log-line.warning .log-text { color: #fde047; }

.log-line.system {
    border-left-color: #6366f1;
}
.log-line.system .log-text { color: #a5b4fc; }

.log-line.change {
    background: rgba(16, 185, 129, 0.08);
    border-left-color: var(--success);
}
.log-line.change .log-text {
    color: #86efac;
    font-weight: 600;
}
.log-line.change {
    animation: highlight-pulse 2s infinite;
}

.empty-log {
    color: var(--text-muted);
    padding: 20px;
    text-align: center;
    font-style: italic;
}

@keyframes highlight-pulse {
    0% { background: rgba(16, 185, 129, 0.08); }
    50% { background: rgba(16, 185, 129, 0.15); }
    100% { background: rgba(16, 185, 129, 0.08); }
}

/* ═══ FULLSCREEN MODAL ═══ */
.modal.modal-fullscreen {
    width: 95vw;
    max-width: 1200px;
    height: 85vh;
    display: flex;
    flex-direction: column;
}

.log-filter-bar {
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-chip {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-chip:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.filter-chip.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.log-container-fullscreen {
    flex: 1;
    padding: 24px;
    background: #05070a;
    overflow-y: auto;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.6;
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.toggle-switch input { display: none; }

.toggle-slider {
    width: 36px;
    height: 18px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 20px;
    position: relative;
    transition: 0.3s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    left: 2px;
    bottom: 2px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--success-bg);
    border-color: var(--success);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(18px);
    background: var(--success);
}

.toggle-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ═══ BADGE ═══ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }

/* ═══ TOAST ═══ */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    min-width: 300px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.3s ease;
    border-left: 3px solid var(--accent);
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

.toast-icon { font-size: 20px; }
.toast-message { flex: 1; font-size: 14px; }
.toast-close {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 18px;
    background: none;
    border: none;
    padding: 0;
}

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

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

/* ═══ EMPTY STATE ═══ */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    max-width: 400px;
    margin: 0 auto 20px;
}

/* ═══ MODAL ═══ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 95%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.2s ease;
}

.modal-header {
    padding: 24px 24px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.modal-body { padding: 0 24px 24px; }

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ═══ PAGES ═══ */
.page { display: none; }
.page.active { display: block; }

/* ═══ SECTION SPACER ═══ */
.section-gap { margin-bottom: 28px; }

/* ═══ MODAL TABS ═══ */
.modal-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}

.modal-tab.active {
    background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.1));
    color: var(--accent-hover);
    border-color: rgba(99,102,241,0.3);
}

/* ═══ INSTANCE META WRAP ═══ */
.instance-meta {
    flex-wrap: wrap;
    align-items: center;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .main-content {
        margin-left: 0;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .page-body {
        padding: 20px 16px;
    }
}