/*
 * Custom CSS for CMSC 178DA Presentations
 * Data Analytics - University of the Philippines Cebu
 * Department of Computer Science
 */

/* Data Analytics Color Palette */
:root {
    --da-primary: #2563EB;      /* Blue - data, charts */
    --da-secondary: #7C3AED;    /* Purple - analytics, insights */
    --da-accent: #10B981;       /* Green - success, positive */
    --da-warning: #F59E0B;      /* Amber - attention, caution */
    --da-dark: #1E293B;         /* Slate dark - backgrounds */
    --da-light: #F1F5F9;        /* Slate light - backgrounds */
    --up-maroon: #7b1113;       /* UP branding */
    --up-gold: #ffd700;         /* UP branding */
    --text-dark: #1E293B;
    --text-light: #64748B;
    --text-muted: #64748B;       /* WCAG AA compliant (was #94a3b8) */
    --header-bg: #2563EB;
    --header-bg-dark: #1D4ED8;
}

/* ===========================================
   Header Bar (Fixed at top)
   =========================================== */
body {
    margin: 0;
    padding: 0;
}

.presenter-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(135deg, var(--da-primary) 0%, var(--da-secondary) 100%);
    color: white;
    padding: 8px 16px;
    border-bottom: 3px solid var(--up-gold);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 12px rgba(37, 99, 235, 0.3);
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.presenter-header h1 {
    font-size: 0.95em;
    font-weight: 500;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: white !important;
    border: none !important;
    padding: 0 !important;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.home-button {
    background: var(--up-gold);
    color: var(--da-dark);
    border: none;
    padding: 6px 12px;
    font-size: 0.75em;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.15s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.home-button:hover {
    background: white;
    color: var(--da-primary);
    transform: translateY(-1px);
}

.home-button svg {
    width: 14px;
    height: 14px;
}

.course-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85em;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.course-badge svg {
    opacity: 0.9;
}

.slide-counter {
    font-size: 0.9em;
    color: var(--up-gold);
    font-weight: 600;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px 12px;
    border-radius: 6px;
}

.header-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    padding: 6px;
    border-radius: 6px;
    cursor: pointer;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.header-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.header-btn svg {
    width: 18px;
    height: 18px;
}

/* ===========================================
   Base typography (with header offset)
   =========================================== */
.reveal {
    margin-top: 50px !important;
    height: calc(100vh - 50px) !important;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 28px;
    color: var(--text-dark);
}

.reveal h1, .reveal h2, .reveal h3 {
    font-weight: 700;
    color: var(--da-primary);
    text-transform: none;
    letter-spacing: -0.02em;
}

.reveal h1 {
    font-size: 2.2em;
    margin-bottom: 0.5em;
}

.reveal h2 {
    font-size: 1.6em;
    margin-bottom: 0.4em;
    border-bottom: 4px solid var(--da-secondary);
    padding-bottom: 0.2em;
    display: inline-block;
}

.reveal h3 {
    font-size: 1.3em;
    color: var(--da-secondary);
}

/* Two column layout */
.two-columns {
    display: flex;
    gap: 2em;
    align-items: flex-start;
}

.two-columns > div {
    flex: 1;
    text-align: left;
}

/* Three column layout */
.three-columns {
    display: flex;
    gap: 1.5em;
    align-items: flex-start;
}

.three-columns > div {
    flex: 1;
    text-align: left;
}

/* Lists */
.reveal ul, .reveal ol {
    text-align: left;
    margin-left: 1em;
}

.reveal li {
    margin-bottom: 0.3em;
    line-height: 1.4;
}

.reveal li::marker {
    color: var(--da-primary);
}

/* Code blocks - Data Analytics style */
.reveal pre {
    width: 100%;
    font-size: 0.65em;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.reveal code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

.reveal pre code {
    padding: 1.2em;
    max-height: 450px;
    background: #1e1e1e;
    border-radius: 12px;
}

/* Inline code */
.reveal p code, .reveal li code {
    background: var(--da-light);
    color: var(--da-primary);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Math display */
.math-display {
    font-size: 1.3em;
    margin: 0.5em 0;
    color: var(--da-dark);
}

/* Images */
.reveal img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* Captions */
.caption {
    font-size: 0.7em;
    color: var(--text-light);
    font-style: italic;
    margin-top: 0.5em;
}

/* Highlight box - for key points */
.highlight-box {
    background: linear-gradient(135deg, #EFF6FF 0%, #F0F9FF 100%);
    border-left: 5px solid var(--da-primary);
    padding: 1em 1.5em;
    border-radius: 0 12px 12px 0;
    text-align: left;
}

/* Definition box - for definitions */
.definition-box {
    background: linear-gradient(135deg, #F5F3FF 0%, #FDF4FF 100%);
    border: 2px solid var(--da-secondary);
    padding: 1em 1.5em;
    border-radius: 12px;
    text-align: left;
}

/* Formula box - for equations */
.formula-box {
    background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
    border: 2px solid var(--da-warning);
    padding: 1em 1.5em;
    border-radius: 12px;
    text-align: center;
}

/* Success box - for positive outcomes */
.success-box {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    border: 2px solid var(--da-accent);
    padding: 1em 1.5em;
    border-radius: 12px;
    text-align: left;
}

/* Case study box */
.case-study-box {
    background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
    border: 2px solid #CBD5E1;
    padding: 1.5em;
    border-radius: 12px;
    text-align: left;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.case-study-box h4 {
    color: var(--da-primary);
    margin-top: 0;
    font-size: 1.1em;
}

/* Progress bar */
.reveal .progress {
    background: rgba(0, 0, 0, 0.2);
    height: 4px;
}

.reveal .progress span {
    background: linear-gradient(90deg, var(--da-primary) 0%, var(--da-secondary) 100%);
    transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
}

/* Slide numbers */
.reveal .slide-number {
    font-size: 14px;
    color: var(--text-light);
    background-color: transparent;
}

/* Section headers (vertical slides) */
.reveal section[data-background-color] h1 {
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

/* Table styling - Data Analytics themed */
.reveal table {
    margin: 1em auto;
    border-collapse: collapse;
    font-size: 0.85em;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.reveal table th {
    background: linear-gradient(135deg, var(--da-primary) 0%, var(--da-secondary) 100%);
    color: white;
    padding: 0.7em 1em;
    font-weight: 600;
}

.reveal table td {
    padding: 0.5em 1em;
    border: 1px solid #e2e8f0;
}

.reveal table tr:nth-child(even) {
    background-color: var(--da-light);
}

.reveal table tr:hover {
    background-color: #E0E7FF;
}

/* Fragment animations */
.reveal .fragment.highlight-current-blue.current-fragment {
    color: var(--da-primary);
}

/* Stat cards for KPIs */
.stat-card {
    background: white;
    border-radius: 12px;
    padding: 1.2em;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

.stat-card .stat-value {
    font-size: 2em;
    font-weight: 700;
    color: var(--da-primary);
    line-height: 1.2;
}

.stat-card .stat-label {
    font-size: 0.8em;
    color: var(--text-light);
    margin-top: 0.3em;
}

.stat-card .stat-change {
    font-size: 0.75em;
    margin-top: 0.3em;
}

.stat-card .stat-change.positive {
    color: var(--da-accent);
}

.stat-card .stat-change.negative {
    color: #EF4444;
}

/* Icon list items */
.icon-list {
    list-style: none;
    padding-left: 0;
}

.icon-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.8em;
    margin-bottom: 0.8em;
}

.icon-list li::before {
    content: none;
}

.icon-list .icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--da-light);
    border-radius: 6px;
    color: var(--da-primary);
}

/* Timeline for process steps */
.timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 1em 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 4px;
    background: linear-gradient(90deg, var(--da-primary) 0%, var(--da-secondary) 100%);
    z-index: 0;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 1;
}

.timeline-item .number {
    width: 40px;
    height: 40px;
    background: var(--da-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-bottom: 0.5em;
}

.timeline-item .label {
    font-size: 0.75em;
    color: var(--text-dark);
    text-align: center;
    max-width: 100px;
}

/* ===========================================
   Overflow Prevention
   =========================================== */
.reveal .slides section {
    overflow: hidden !important;
}

/* ===========================================
   Source Footnotes
   =========================================== */
.source-note {
    font-size: 0.7em;
    color: var(--text-light);
    margin-top: 0.8em;
}

.source-note a {
    color: var(--da-primary);
}

/* ===========================================
   Two-Column Density Variants
   =========================================== */
.two-columns-compact {
    gap: 1.5em !important;
    font-size: 0.9em;
}

.two-columns-dense {
    gap: 1.5em !important;
    font-size: 0.85em;
}

/* Print styles */
@media print {
    .presenter-header {
        display: none;
    }

    .reveal {
        margin-top: 0 !important;
        height: 100vh !important;
    }

    .reveal .slide-number {
        display: none;
    }

    .reveal section {
        page-break-after: always;
    }
}

/* Mobile responsiveness */
@media screen and (max-width: 768px) {
    .presenter-header {
        padding: 6px 12px;
    }

    .presenter-header h1 {
        display: none;
    }

    .course-badge span {
        display: none;
    }

    .header-left {
        gap: 10px;
    }

    .home-button span {
        display: none;
    }

    .reveal {
        font-size: 20px;
        margin-top: 45px !important;
        height: calc(100vh - 45px) !important;
    }

    .two-columns, .three-columns {
        flex-direction: column;
    }

    .reveal pre {
        font-size: 0.55em;
    }

    .stat-card .stat-value {
        font-size: 1.5em;
    }
}

/* Accessibility: Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .reveal .slides section {
        transition: none !important;
    }

    .reveal .slide-background {
        transition: none !important;
    }

    .reveal .fragment {
        transition: none !important;
    }

    .reveal .slides section .fragment.visible {
        transition: none !important;
    }

    /* Disable all Reveal.js animations */
    .reveal .slides > section,
    .reveal .slides > section > section {
        transition: none !important;
    }
}

/* ===========================================
   Activity Boxes for Interactive Exercises
   =========================================== */
.activity-box {
    background: linear-gradient(135deg, #DBEAFE 0%, #E0E7FF 100%);
    border: 3px solid var(--da-primary);
    border-radius: 16px;
    padding: 1.5em 2em;
    text-align: left;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.activity-box h4 {
    color: var(--da-primary);
    margin-top: 0;
    margin-bottom: 0.8em;
    font-size: 1.1em;
}

.activity-box p {
    margin-bottom: 0.8em;
}

.activity-box .timer {
    font-size: 0.85em;
    color: var(--da-warning);
    font-weight: 700;
    text-align: right;
    margin-top: 1em;
    padding: 0.4em 0.8em;
    background: rgba(245, 158, 11, 0.15);
    border-radius: 8px;
    display: inline-block;
    float: right;
}

.activity-box .timer::before {
    content: "⏱ ";
}

.activity-box table {
    margin: 1em 0;
    width: 100%;
}

.activity-box table input[type="text"] {
    width: 60px;
    padding: 0.3em;
    text-align: center;
    border: 2px solid var(--da-primary);
    border-radius: 4px;
    font-size: 0.9em;
}

/* ===========================================
   Simple Inline Charts (SVG-based)
   =========================================== */
.chart-container {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 1.5em;
    height: 280px;
    padding: 1.5em;
    background: var(--da-light);
    border-radius: 12px;
    margin: 1em 0;
}

.chart-bar {
    width: 70px;
    background: linear-gradient(180deg, var(--da-primary) 0%, var(--da-secondary) 100%);
    border-radius: 8px 8px 0 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 0.5em;
    color: white;
    font-weight: 600;
    font-size: 0.85em;
    position: relative;
    transition: transform 0.2s ease;
}

.chart-bar:hover {
    transform: scaleY(1.02);
}

.chart-bar .bar-value {
    font-size: 1.1em;
    font-weight: 700;
}

.chart-bar .bar-label {
    position: absolute;
    bottom: -2em;
    font-size: 0.75em;
    color: var(--text-dark);
    text-align: center;
    width: 100%;
}

.chart-bar.positive {
    background: linear-gradient(180deg, var(--da-accent) 0%, #059669 100%);
}

.chart-bar.negative {
    background: linear-gradient(180deg, #EF4444 0%, #B91C1C 100%);
}

.chart-bar.warning {
    background: linear-gradient(180deg, var(--da-warning) 0%, #D97706 100%);
}

/* Line chart styling (SVG-based) */
.line-chart {
    width: 100%;
    max-width: 700px;
    margin: 1em auto;
    background: linear-gradient(to bottom, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 12px;
    padding: 1em 1.5em;
    box-sizing: border-box;
}

.line-chart svg {
    width: 100%;
    height: auto;
    display: block;
}

.line-chart .grid-line {
    stroke: #e2e8f0;
    stroke-width: 1;
}

.line-chart .grid-line-dashed {
    stroke: #e2e8f0;
    stroke-width: 1;
    stroke-dasharray: 4 4;
}

.line-chart .chart-line {
    fill: none;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.line-chart .data-point {
    fill: white;
    stroke-width: 3;
}

.line-chart .data-point:hover {
    r: 7;
}

.line-chart .axis-label {
    font-size: 11px;
    fill: #64748b;
    font-family: 'Inter', sans-serif;
}

.line-chart .data-label {
    font-size: 10px;
    font-weight: 600;
    fill: #1e293b;
    font-family: 'Inter', sans-serif;
}

.line-chart .y-axis-label {
    font-size: 10px;
    fill: #64748B;
    font-family: 'Inter', sans-serif;
}

.line-chart .chart-title {
    font-size: 14px;
    font-weight: 600;
    fill: #1e293b;
    font-family: 'Inter', sans-serif;
}

/* Horizontal bar chart (SVG-based) */
.horizontal-bar-chart {
    width: 100%;
    max-width: 350px;
    height: auto;
    background: linear-gradient(to bottom, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 12px;
    padding: 0.5em;
}

.horizontal-bar-chart .bar-label-h {
    font-size: 10px;
    fill: #374151;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.horizontal-bar-chart .bar-value-h {
    font-size: 10px;
    fill: #1e293b;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.horizontal-bar-chart .axis-tick {
    font-size: 9px;
    fill: #64748B;
    font-family: 'Inter', sans-serif;
}

.horizontal-bar-chart rect {
    transition: opacity 0.2s ease;
}

.horizontal-bar-chart rect:hover {
    opacity: 0.85;
    filter: brightness(1.1);
}

/* Vertical bar chart (SVG-based) */
.vertical-bar-chart-container {
    display: flex;
    justify-content: center;
    padding: 1em;
}

.vertical-bar-chart {
    width: 100%;
    max-width: 500px;
    height: auto;
    background: linear-gradient(to bottom, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 12px;
    padding: 0.5em;
}

.vertical-bar-chart .axis-label-v {
    font-size: 11px;
    fill: #64748B;
    font-family: 'Inter', sans-serif;
}

.vertical-bar-chart .bar-value-v {
    font-size: 14px;
    fill: white;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.vertical-bar-chart .bar-label-v {
    font-size: 12px;
    fill: #1e293b;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.vertical-bar-chart .bar-sublabel {
    font-size: 10px;
    fill: #64748b;
    font-family: 'Inter', sans-serif;
}

.vertical-bar-chart rect {
    transition: opacity 0.2s ease;
}

.vertical-bar-chart rect:hover {
    opacity: 0.85;
}

/* Chart legend */
.chart-legend {
    display: flex;
    justify-content: center;
    gap: 2em;
    margin-top: 1em;
    font-size: 0.8em;
}

.chart-legend-item {
    display: flex;
    align-items: center;
    gap: 0.5em;
}

.chart-legend-item .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.chart-legend-item .dot.primary {
    background: var(--da-primary);
}

.chart-legend-item .dot.secondary {
    background: var(--da-secondary);
}

.chart-legend-item .dot.accent {
    background: var(--da-accent);
}

/* ===========================================
   Discussion/Think-Pair-Share boxes
   =========================================== */
.discussion-box {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border: 3px solid var(--da-warning);
    border-radius: 16px;
    padding: 1.5em 2em;
    text-align: left;
}

.discussion-box h4 {
    color: #B45309;
    margin-top: 0;
}

.discussion-box .prompt {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-dark);
    margin: 1em 0;
}

.discussion-box .instructions {
    font-size: 0.85em;
    color: var(--text-light);
}

/* ===========================================
   Code output styling
   =========================================== */
.code-output {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 1em;
    border-radius: 0 0 12px 12px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.75em;
    margin-top: -12px;
    border-top: 2px dashed #3c3c3c;
}

.code-output::before {
    content: "Output:";
    display: block;
    color: #6A9955;
    margin-bottom: 0.5em;
    font-weight: 600;
}

/* Pandas DataFrame output styling */
.dataframe-output {
    overflow-x: auto;
    margin: 1em 0;
}

.dataframe-output table {
    font-size: 0.7em;
    border-collapse: collapse;
    width: 100%;
}

.dataframe-output th {
    background: var(--da-primary);
    color: white;
    padding: 0.5em;
    font-weight: 600;
}

.dataframe-output td {
    padding: 0.4em 0.6em;
    border: 1px solid #e2e8f0;
}

.dataframe-output tr:nth-child(even) {
    background: var(--da-light);
}

/* ===========================================
   Slide Image Constraints
   Prevents images from overflowing on high-DPI displays
   =========================================== */
.reveal section img.slide-image {
    max-width: 100%;
    max-height: 55vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.reveal section img.slide-image-large {
    max-width: 95%;
    max-height: 60vh;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.reveal section img.slide-image-small {
    max-width: 100%;
    max-height: 45vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}