style.css

/* ==========================================================================
   Cyclic Voltammetry Analysis - High-Contrast Academic Theme
   WCAG AAA High Contrast & Crisp Typography
   ========================================================================== */

:root {
    --color-bg-site: #0b1120;
    --color-bg-panel: #131d31;
    --color-bg-alt: #1e293b;
    --color-bg-input: #0f172a;
    
    --color-text-main: #ffffff;
    --color-text-body: #e2e8f0;
    --color-text-muted: #cbd5e1;
    --color-text-dim: #94a3b8;
    
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-accent: #38bdf8;
    --color-accent-rose: #f43f5e;
    --color-accent-emerald: #10b981;
    --color-accent-amber: #fbbf24;
    
    --color-border: #334155;
    --color-border-subtle: #1e293b;
    --color-border-input: #475569;
    --color-focus: rgba(56, 189, 248, 0.4);
    
    --shadow-panel: 0 4px 16px rgba(0, 0, 0, 0.4);
    
    --radius-lg: 10px;
    --radius-md: 8px;
    --radius-sm: 6px;
    
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

/* Force dark theme baseline over any Gradio parent injection */
html, body, .gradio-container {
    background-color: var(--color-bg-site) !important;
    color: var(--color-text-body) !important;
    font-family: var(--font-stack) !important;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

body {
    display: flex;
    flex-direction: column;
}

/* Headings with Maximum Contrast */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700 !important;
    color: #ffffff !important;
    letter-spacing: -0.015em;
}

h1 { font-size: 1.5rem !important; }
h2 { font-size: 1.15rem !important; }
h3 { font-size: 1.0rem !important; }

p {
    margin-bottom: 0.75rem;
    color: var(--color-text-body) !important;
}

/* Top Navigation Bar */
.top-nav {
    background-color: var(--color-bg-panel);
    border-bottom: 1px solid var(--color-border);
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-container {
    max-width: 1750px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-brand {
    display: flex;
    align-items: baseline;
    gap: 0.85rem;
}

.brand-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff !important;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 0.88rem;
    font-weight: 500;
    color: #94a3b8 !important;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* JAX Engine Status Badge - Ultra-Crisp High-Contrast Text */
.engine-badge {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background-color: #1e293b !important;
    border: 1px solid #475569 !important;
    padding: 0.45rem 1rem;
    border-radius: 9999px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.engine-text, #engine-label {
    font-size: 0.88rem !important;
    font-weight: 700 !important;
    color: #ffffff !important;
    letter-spacing: 0.01em;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
}

.status-dot.online {
    background-color: #4ade80 !important;
    box-shadow: 0 0 10px #4ade80 !important;
}

/* Main Layout Grid */
.app-container {
    flex: 1;
    max-width: 1750px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
    width: 100%;
}

.content-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 1100px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Panels */
.panel {
    background-color: var(--color-bg-panel) !important;
    border: 1px solid var(--color-border) !important;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-panel);
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    background-color: rgba(255, 255, 255, 0.025);
}

.panel-header h2, .panel-header h3 {
    color: #ffffff !important;
    font-weight: 700 !important;
}

.panel-body {
    padding: 1.25rem;
}

.chart-panel-body {
    padding: 0.75rem 1rem 1rem 1rem;
}

/* File Upload Area */
.file-upload-wrapper {
    margin-bottom: 1.25rem;
}

.section-label {
    display: block;
    font-size: 0.85rem !important;
    font-weight: 700 !important;
    color: #e2e8f0 !important;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.file-upload-box {
    border: 1.5px dashed #475569;
    border-radius: var(--radius-md);
    padding: 1.25rem 1rem;
    text-align: center;
    background-color: var(--color-bg-alt);
    transition: all 0.2s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.file-upload-box:hover, .file-upload-wrapper.dragover .file-upload-box {
    border-color: #38bdf8;
    background-color: rgba(56, 189, 248, 0.08);
}

.file-icon {
    font-size: 1.5rem;
}

.btn-file-select {
    display: inline-block;
    background-color: #0f172a !important;
    border: 1px solid #475569 !important;
    color: #ffffff !important;
    padding: 0.45rem 1rem;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.drag-hint {
    font-size: 0.78rem !important;
    color: #94a3b8 !important;
}

.file-status-row {
    margin-top: 0.5rem;
    font-size: 0.82rem !important;
    color: #cbd5e1 !important;
    font-family: var(--font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-status-row span.has-file {
    color: #38bdf8 !important;
    font-weight: 700 !important;
}

.hidden-file-input {
    display: none;
}

/* Form Styles & High-Contrast Inputs */
.form-section {
    border: 1px solid #334155 !important;
    padding: 1rem;
    margin-bottom: 1.15rem;
    background-color: rgba(15, 23, 42, 0.6) !important;
    border-radius: var(--radius-md);
}

.form-section legend {
    font-weight: 700 !important;
    font-size: 0.82rem !important;
    color: #38bdf8 !important;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0 0.4rem;
    border: none;
}

.input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

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

label {
    font-size: 0.82rem !important;
    font-weight: 600 !important;
    color: #e2e8f0 !important;
    margin-bottom: 0.35rem;
}

label i, label sub {
    font-family: serif;
    font-style: italic;
    color: #f1f5f9 !important;
}

input[type="number"], input[type="text"], select.academic-dropdown {
    font-family: var(--font-mono) !important;
    font-size: 0.88rem !important;
    font-weight: 500 !important;
    padding: 0.55rem 0.75rem !important;
    border: 1px solid #475569 !important;
    border-radius: var(--radius-sm);
    background-color: #0f172a !important;
    color: #ffffff !important;
    transition: all 0.2s ease;
    width: 100%;
}

select.academic-dropdown {
    font-family: var(--font-stack) !important;
    cursor: pointer;
}

select.academic-dropdown option {
    background-color: #0f172a !important;
    color: #ffffff !important;
}

input:focus, select:focus {
    outline: none;
    border-color: #38bdf8 !important;
    box-shadow: 0 0 0 3px var(--color-focus) !important;
}

.column-meta-bar {
    margin-top: 0.65rem;
    font-size: 0.8rem !important;
    color: #cbd5e1 !important;
}

.column-meta-bar strong {
    color: #ffffff !important;
}

.col-stats-preview {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.stat-pill {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem !important;
    background-color: #1e293b !important;
    padding: 0.35rem 0.65rem;
    border-radius: 4px;
    border: 1px solid #334155 !important;
}

.stat-k {
    color: #94a3b8 !important;
    font-weight: 500;
}

.stat-v {
    color: #38bdf8 !important;
    font-family: var(--font-mono);
    font-weight: 700;
}

/* Advanced Collapsible Section */
.advanced-section {
    margin-bottom: 1.15rem;
}

.advanced-toggle {
    background-color: #1e293b !important;
    border: 1px solid #334155 !important;
    color: #e2e8f0 !important;
    padding: 0.55rem 0.85rem !important;
    font-size: 0.82rem !important;
    font-weight: 600 !important;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.advanced-toggle:hover {
    color: #ffffff !important;
    border-color: #38bdf8 !important;
    background-color: #0f172a !important;
}

.advanced-content {
    margin-top: 0.65rem;
}

.sub-section {
    margin-bottom: 0;
}

/* Buttons */
button {
    font-family: var(--font-stack) !important;
    font-weight: 700 !important;
    font-size: 0.92rem !important;
    padding: 0.75rem 1.5rem !important;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    width: 100%;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: #2563eb !important;
    color: #ffffff !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.btn-primary:hover:not(:disabled) {
    background-color: #1d4ed8 !important;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Export Actions */
.results-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.export-actions {
    display: flex;
    gap: 0.6rem;
}

.btn-export {
    background-color: #1e293b !important;
    border: 1px solid #475569 !important;
    color: #ffffff !important;
    padding: 0.45rem 0.9rem !important;
    font-size: 0.82rem !important;
    font-weight: 600 !important;
    border-radius: var(--radius-sm);
    width: auto;
    transition: all 0.2s ease;
}

.btn-export:hover {
    border-color: #38bdf8 !important;
    color: #38bdf8 !important;
    background-color: #0f172a !important;
}

/* Status Header in Chart Panel */
.status-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.status-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-left h2 {
    font-size: 1.15rem !important;
    color: #38bdf8 !important;
    margin-bottom: 0.15rem;
}

.status-left p {
    font-size: 0.85rem !important;
    color: #cbd5e1 !important;
    margin: 0;
}

.status-left p strong {
    color: #ffffff !important;
}

/* Spinner */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid #334155;
    border-top-color: #38bdf8;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Chart Canvas Dimensions */
.chart-wrapper-large {
    height: 580px;
    width: 100%;
    min-height: 580px;
}

.secondary-charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.chart-wrapper-diagnostic {
    height: 460px;
    width: 100%;
    min-height: 460px;
}

@media (max-width: 1280px) {
    .secondary-charts-grid {
        grid-template-columns: 1fr;
    }
}

/* Parameter Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.stat-card {
    background-color: #1e293b !important;
    border: 1px solid #334155 !important;
    border-radius: var(--radius-md);
    padding: 1rem 1.15rem;
    display: flex;
    flex-direction: column;
}

.stat-card .stat-label {
    font-size: 0.76rem !important;
    font-weight: 700 !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94a3b8 !important;
    margin-bottom: 0.35rem;
}

.stat-card .stat-value {
    font-size: 1.25rem !important;
    font-weight: 800 !important;
    color: #ffffff !important;
    font-family: var(--font-mono);
}

.hidden {
    display: none !important;
}