/* Cipher Nodes - Main Stylesheet */
/* Premium dark-first design with responsive breakpoints */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --sidebar-width: 260px;
    --header-height: 56px;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.2s ease;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border: #cbd5e1;
    --shadow: rgba(0, 0, 0, 0.08);
}

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    touch-action: manipulation;
    /* Fluid base size: scales gently with viewport yet stays usable when zoomed. */
    font-size: clamp(14px, 0.9rem + 0.2vw, 16px);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Never let content blow past the screen at any zoom level. */
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ==================== AUTH PAGES ==================== */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--bg-primary);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: 0 4px 24px var(--shadow);
}

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    color: var(--accent);
    margin-bottom: 12px;
}

.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 4px;
}

/* ==================== ALERTS ==================== */
.alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

/* ==================== FORMS ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input,
.input-wrapper select,
.input-wrapper textarea {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: var(--transition);
    outline: none;
}

.input-wrapper input:focus,
.input-wrapper select:focus,
.input-wrapper textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-secondary);
    pointer-events: none;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-password:hover { color: var(--text-primary); }

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-size: 0.875rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-label input { display: none; }

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.checkbox-label input:checked + .checkmark {
    background: var(--accent);
    border-color: var(--accent);
}

.checkbox-label input:checked + .checkmark::after {
    content: '';
    width: 5px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.5;
    min-height: 44px;
    min-width: 44px;
}

.btn:active { transform: scale(0.97); }

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

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

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover { background: rgba(239, 68, 68, 0.25); }

.btn-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn-success:hover { background: rgba(16, 185, 129, 0.25); }

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover { background: #475569; }

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

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

.btn-sm { padding: 6px 12px; font-size: 0.8125rem; min-height: 36px; }

.btn-full { width: 100%; }

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

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

/* Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
}

.mobile-header .hamburger {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-header .logo-text {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--accent);
}

.mobile-header .header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 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: 90;
    transition: transform 0.3s ease;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 89;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

.sidebar-header svg {
    width: 32px;
    height: 32px;
    color: var(--accent);
    flex-shrink: 0;
}

.sidebar-header h2 {
    font-size: 1.125rem;
    font-weight: 700;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 12px 0;
    -webkit-overflow-scrolling: touch;
}

.nav-section {
    margin-bottom: 8px;
}

.nav-section-title {
    padding: 8px 20px;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
    margin: 2px 0;
}

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

.nav-link:hover {
    background: rgba(59, 130, 246, 0.08);
    color: var(--text-primary);
}

.nav-link.active {
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent);
    border-left-color: var(--accent);
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    color: white;
    flex-shrink: 0;
}

.user-details {
    min-width: 0;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

.sidebar-actions .btn {
    flex: 1;
    justify-content: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px 32px;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

/* Fixed-height chart container prevents Chart.js canvas from infinitely growing ("collapsing downwards") */
.chart-box {
    position: relative;
    height: 280px;
    width: 100%;
}

.chart-box canvas {
    width: 100% !important;
    height: 100% !important;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
}

/* Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon.blue { background: rgba(59, 130, 246, 0.15); color: var(--accent); }
.stat-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.stat-icon.amber { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.stat-icon.red { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-change {
    font-size: 0.75rem;
    font-weight: 500;
}

.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ==================== TABLES ==================== */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

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

th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
    white-space: nowrap;
}

td {
    padding: 14px 16px;
    border-top: 1px solid var(--border);
    color: var(--text-primary);
}

tr:hover td {
    background: rgba(59, 130, 246, 0.04);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.badge-amber {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.badge-red {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.badge-gray {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
}

.badge-blue {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent);
}

/* ==================== MODALS ==================== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform 0.2s ease;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

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

.modal-title {
    font-size: 1.125rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

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

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* ==================== TOAST ==================== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 16px var(--shadow);
    animation: slideIn 0.3s ease;
    min-width: 280px;
    max-width: 400px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }

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

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

/* ==================== PAGINATION ==================== */
.pagination {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 20px;
}

.pagination a,
.pagination span {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
}

.pagination a:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.pagination .current {
    background: var(--accent);
    color: white;
}

/* ==================== PROGRESS BAR ==================== */
.progress-container {
    background: var(--bg-primary);
    border-radius: 999px;
    height: 8px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 999px;
    transition: width 0.3s ease;
}

/* ==================== FILTERS ==================== */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-bar input,
.filter-bar select {
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    min-width: 160px;
}

.filter-bar input:focus,
.filter-bar select:focus {
    border-color: var(--accent);
}

/* ==================== MOBILE RESPONSIVE ==================== */
@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

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

    .main-content {
        margin-left: 0;
        padding: 80px 16px 24px;
    }

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

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

    .modal {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-width: 100%;
        border-radius: var(--radius) var(--radius) 0 0;
        max-height: 85vh;
        transform: translateY(100%);
    }

    .modal-overlay.active .modal {
        transform: translateY(0);
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-bar input,
    .filter-bar select {
        width: 100%;
    }

    .page-header h1 {
        font-size: 1.25rem;
    }

    .btn {
        min-height: 48px;
    }

    table {
        font-size: 0.8125rem;
        min-width: 720px;
    }

    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    th, td {
        padding: 10px 12px;
    }
}

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

    .auth-card {
        padding: 28px 20px;
    }

    .card {
        padding: 16px;
    }
}

/* ==================== UTILITIES ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-secondary { color: var(--text-secondary); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }

.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }

.w-full { width: 100%; }
.hidden { display: none !important; }

/* Focus states for accessibility */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}