/* ==========================================================================
   OptiWatch Premium Stylesheet - Glassmorphic Dark UI
   ========================================================================== */

:root {
    --bg-primary: hsl(222, 47%, 7%);
    --bg-secondary: hsl(222, 47%, 12%);
    --bg-glass: rgba(15, 23, 42, 0.55);
    --bg-glass-card: rgba(30, 41, 59, 0.45);
    --border-glow: rgba(56, 189, 248, 0.15);
    --border-light: rgba(255, 255, 255, 0.07);
    --border-focus: rgba(56, 189, 248, 0.5);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 25%, 72%);
    --text-muted: hsl(215, 15%, 52%);

    --accent-cyan: hsl(188, 90%, 50%);
    --accent-cyan-glow: rgba(6, 182, 212, 0.3);
    --accent-emerald: hsl(150, 84%, 48%);
    --accent-emerald-glow: rgba(16, 185, 129, 0.3);
    --accent-rose: hsl(343, 85%, 60%);
    --accent-rose-glow: rgba(244, 63, 94, 0.3);
    --accent-amber: hsl(38, 92%, 52%);
    --accent-amber-glow: rgba(245, 158, 11, 0.3);
    
    --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 15px rgba(6, 182, 212, 0.2);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Resets & Layout */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(30, 58, 138, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(88, 28, 135, 0.1) 0px, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Container Layout */
.app-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    padding: 1.5rem;
    position: sticky;
    top: 0;
    height: 100vh;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.logo-icon {
    font-size: 2rem;
    color: var(--accent-cyan);
    filter: drop-shadow(0 0 8px var(--accent-cyan-glow));
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 40%, var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text span {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* Nav Tabs */
.nav-tabs {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 12px;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-normal);
}

.tab-btn i {
    font-size: 1.15rem;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: var(--bg-primary);
    background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
    box-shadow: 0 0 15px var(--accent-cyan-glow);
    font-weight: 700;
}

.tab-btn.active i {
    color: var(--bg-primary);
}

/* Sidebar Section & Controls */
.sidebar-section {
    border-top: 1px solid var(--border-light);
    padding-top: 1.5rem;
    margin-top: auto;
}

.sidebar-section h3 {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-group {
    margin-bottom: 1.25rem;
}

.control-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* Custom Range Input styling */
.range-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-cyan);
    cursor: pointer;
    box-shadow: 0 0 8px var(--accent-cyan-glow);
    transition: var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: #fff;
}

.badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 0.2rem 0.4rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    min-width: 42px;
    text-align: center;
}

.badge-info {
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.05);
}

.footer-credit {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    text-align: center;
}

.footer-credit p {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 600;
}

.footer-credit span {
    font-size: 0.6rem;
    color: rgba(255, 255, 255, 0.2);
    font-family: var(--font-mono);
}

/* Main Content Styling */
.main-content {
    flex-grow: 1;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
}

/* Top Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-light);
}

.header-title-container h2 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.header-title-container p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.system-status {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg-glass-card);
    border: 1px solid var(--border-light);
    border-radius: 30px;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: var(--shadow-main);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-indicator.idle {
    background-color: var(--text-muted);
    box-shadow: 0 0 6px var(--text-muted);
}

.status-indicator.running {
    background-color: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan);
    animation: pulse 1.5s infinite alternate;
}

.status-indicator.converged {
    background-color: var(--accent-emerald);
    box-shadow: 0 0 10px var(--accent-emerald);
}

.status-indicator.paused {
    background-color: var(--accent-amber);
    box-shadow: 0 0 10px var(--accent-amber);
}

@keyframes pulse {
    0% { opacity: 0.4; }
    100% { opacity: 1; }
}

/* Tab Panes */
.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Grid & Dashboard layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-span-2 {
    grid-column: span 2;
}

.grid-span-1 {
    grid-column: span 1;
}

.sidebar-card-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Card General Styling */
.card {
    background: var(--bg-glass-card);
    border: 1px solid var(--border-light);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: var(--shadow-main);
    backdrop-filter: blur(12px);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    border-color: var(--border-glow);
    box-shadow: 0 10px 40px -15px rgba(0,0,0,0.6), 0 0 20px rgba(56, 189, 248, 0.03);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    padding-bottom: 0.75rem;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    letter-spacing: -0.2px;
}

.card-title i {
    color: var(--accent-cyan);
}

/* Canvas Styling */
.canvas-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: hsl(222, 47%, 4%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block;
    max-width: 100%;
    cursor: default;
}

.canvas-overlay {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--accent-cyan);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    color: var(--accent-cyan);
    pointer-events: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-glow);
}

.canvas-overlay.visible {
    opacity: 1;
    transform: translateY(0);
}

.legend-panel {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    display: flex;
    gap: 0.8rem;
    box-shadow: var(--shadow-main);
}

.legend-item {
    font-size: 0.7rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
}

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

.dot-global { background-color: var(--accent-emerald); box-shadow: 0 0 6px var(--accent-emerald); }
.dot-local { background-color: var(--accent-rose); box-shadow: 0 0 6px var(--accent-rose); }
.dot-plateau { background-color: var(--accent-amber); box-shadow: 0 0 6px var(--accent-amber); }
.dot-ridge { background-color: var(--accent-cyan); box-shadow: 0 0 6px var(--accent-cyan); }

/* Simulation Control Buttons */
.sim-controls {
    margin-top: 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.btn-group {
    display: flex;
    gap: 0.75rem;
}

.btn {
    border: 1px solid transparent;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-normal);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
    color: var(--bg-primary);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.2);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(6, 182, 212, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
}

.btn-danger {
    background: linear-gradient(135deg, var(--accent-rose), #be123c);
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(244, 63, 94, 0.2);
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(244, 63, 94, 0.35);
}

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

.btn-outline:hover:not(:disabled) {
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

/* Switch styling */
.restart-wrapper {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.switch-container {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 20px;
}

.switch-container input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255,255,255,0.1);
    transition: .4s;
    border-radius: 20px;
}

.switch-slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
}

input:checked + .switch-slider {
    background-color: var(--accent-cyan);
}

input:focus + .switch-slider {
    box-shadow: 0 0 1px var(--accent-cyan);
}

input:checked + .switch-slider:before {
    transform: translateX(20px);
}

/* Stats Grid Card */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.stat-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    padding: 0.85rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.grid-span-2-box {
    grid-column: span 2;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.font-mono {
    font-family: var(--font-mono);
}

.text-emerald { color: var(--accent-emerald); text-shadow: 0 0 6px var(--accent-emerald-glow); }
.text-rose { color: var(--accent-rose); text-shadow: 0 0 6px var(--accent-rose-glow); }
.text-amber { color: var(--accent-amber); text-shadow: 0 0 6px var(--accent-amber-glow); }

/* Config Panel & Sub Tabs */
.config-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 0.25rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-light);
}

.cfg-tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 0.5rem 0.2rem;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.cfg-tab-btn:hover {
    color: var(--text-primary);
}

.cfg-tab-btn.active {
    background: rgba(255, 255, 255, 0.06);
    color: var(--accent-cyan);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.cfg-pane {
    display: none;
}

.cfg-pane.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.control-group-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.select-input, .select-input-sm, .select-input-sm-inline, .number-input, .number-input-sm-inline {
    width: 100%;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 0.6rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition-fast);
}

.select-input:focus, .number-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 6px var(--accent-cyan-glow);
}

.select-input-sm {
    padding: 0.5rem 0.3rem;
    font-size: 0.75rem;
}

.select-input-sm-inline, .number-input-sm-inline {
    width: auto;
    display: inline-block;
    padding: 0.4rem 0.6rem;
    font-size: 0.8rem;
}

.help-text {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 1rem;
    line-height: 1.4;
}

.canvas-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    border: 1px solid transparent;
    padding: 0.35rem 0.7rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition-fast);
}

.text-btn {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    border-color: var(--border-light);
}

.text-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

.text-btn.active {
    background: var(--accent-cyan-glow);
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

/* Info Box / Educational Area */
.margin-top { margin-top: 1.5rem; }
.margin-bottom { margin-bottom: 1.5rem; }

.info-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-card h3 i {
    color: var(--accent-cyan);
}

.info-content-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.info-content-grid h4 {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.info-content-grid p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.info-content-grid code {
    font-family: var(--font-mono);
    background: rgba(0,0,0,0.3);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.03);
}

/* Tab Comparison Layout */
.config-card-full {
    background: var(--bg-glass-card);
    border: 1px solid var(--border-light);
    border-radius: 18px;
    padding: 1.25rem;
    box-shadow: var(--shadow-main);
}

.comp-control-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.comp-control-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.comp-control-item label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    white-space: nowrap;
}

.comp-btn-wrapper {
    display: flex;
    gap: 0.75rem;
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

/* Progress bar */
.progress-bar-container {
    margin-top: 1rem;
    width: 100%;
    height: 16px;
    background: rgba(0,0,0,0.25);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-bar-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-emerald));
    transition: width 0.15s linear;
}

.progress-bar-container span {
    position: relative;
    z-index: 2;
    font-size: 0.7rem;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
    font-family: var(--font-mono);
}

/* Charts */
.chart-card {
    display: flex;
    flex-direction: column;
}

.chart-container {
    position: relative;
    flex-grow: 1;
    min-height: 250px;
    width: 100%;
    margin-top: 0.5rem;
}

/* Comparison Table */
.table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.comparison-table th {
    background: rgba(0, 0, 0, 0.2);
    padding: 0.85rem 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.05);
}

.comparison-table td {
    padding: 1rem;
    font-size: 0.85rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

.alg-name-col {
    font-weight: 700;
    color: var(--text-primary) !important;
}

.alg-name-col i {
    color: var(--accent-cyan);
    margin-right: 0.5rem;
}

.status-col span {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 800;
}

.badge-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    color: var(--text-muted);
}

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

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.18);
}