/* Vintage Color Palette & Design Tokens */
:root {
    --cork-bg: #1e1510;
    --paper-light: #eedeb0; /* Age-stained yellowed paper */
    --paper-dark: #dfcca2;
    --ink-dark: #1c1c1e;   /* Authentic printers ink */
    --ink-faded: #48484a;
    --border-paper: rgba(0, 0, 0, 0.15);
    
    /* Classification colors (Red-pinned strings, brass, copper, etc.) */
    --color-programming: #c0392b;   /* Deep crimson */
    --color-architecture: #d35400;  /* Burnt orange */
    --color-ai: #27ae60;           /* Forest green */
    --color-dsa: #2980b9;          /* Deep Prussian blue */
    --color-devops: #8e44ad;       /* Dark Royal purple */
    --string-color: #e74c3c;       /* Red yarn string */
}

/* Reset and Layout */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--cork-bg);
    color: var(--ink-dark);
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    user-select: none;
}

/* 2D Canvas underlay */
#graphCanvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

#graphCanvas:active {
    cursor: grabbing;
}

/* Retro Top Secret Header */
.retro-header {
    position: absolute;
    top: 24px;
    left: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: var(--paper-light);
    border: 3px double #8a7a5f;
    box-shadow: 8px 8px 24px rgba(0, 0, 0, 0.6), inset 0 0 40px rgba(138, 122, 95, 0.15);
    padding: 16px 24px;
    border-radius: 4px;
    z-index: 10;
    max-width: 420px;
    pointer-events: auto;
    transform: rotate(-1deg);
}

.header-stamp {
    align-self: flex-start;
    border: 3px solid #c0392b;
    color: #c0392b;
    font-family: 'Special Elite', monospace;
    font-size: 11px;
    font-weight: bold;
    padding: 2px 8px;
    border-radius: 3px;
    letter-spacing: 2px;
    transform: rotate(-6deg);
    margin-bottom: 4px;
}

.header-title h1 {
    font-family: 'Playfair Display', serif;
    font-weight: 800;
    font-size: 18px;
    color: var(--ink-dark);
    letter-spacing: -0.5px;
    border-bottom: 2px solid var(--ink-dark);
    padding-bottom: 4px;
    margin-bottom: 4px;
}

.header-title p {
    font-family: 'Courier Prime', monospace;
    font-size: 11px;
    color: var(--ink-faded);
}

/* Search Bar (Typewriter scrap style) */
.search-box {
    margin-top: 12px;
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.15);
    padding: 8px 12px;
    border-radius: 4px;
}

.search-box input {
    background: none;
    border: none;
    outline: none;
    font-family: 'Courier Prime', monospace;
    font-size: 12px;
    color: var(--ink-dark);
    width: 100%;
    margin-left: 8px;
}

.search-box input::placeholder {
    color: #8e8e93;
}

/* Bottom Right Brass Controls Overlay */
.retro-controls {
    position: absolute;
    bottom: 24px;
    right: 24px;
    display: flex;
    gap: 16px;
    z-index: 10;
    background: #2c2520;
    border: 2px solid #5a4b40;
    border-radius: 8px;
    padding: 12px 16px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.5);
}

.knob-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.control-label {
    font-family: 'Courier Prime', monospace;
    font-size: 9px;
    color: #a58e7f;
    font-weight: bold;
    letter-spacing: 1px;
}

/* Pan direction pad styling */
.pan-pad {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.pan-row {
    display: flex;
    gap: 2px;
}

.control-btn {
    background: #3e322a;
    border: 1px solid #665243;
    color: #d8c2b1;
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.control-btn:hover {
    background: #504036;
    color: #fff;
}

.control-btn:active {
    background: #251d19;
}

.control-btn.reset {
    font-size: 12px;
    font-weight: bold;
}

/* Zoom controls styling */
.zoom-pad {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.control-btn.zoom {
    width: 32px;
    height: 32px;
    font-size: 14px;
}

/* Classification Legend Overlay */
.retro-legend {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: var(--paper-light);
    border: 2px solid #8a7a5f;
    padding: 12px 16px;
    border-radius: 4px;
    z-index: 10;
    box-shadow: 4px 4px 15px rgba(0, 0, 0, 0.4);
    transform: rotate(0.5deg);
    max-width: 220px;
}

.legend-title {
    font-family: 'Playfair Display', serif;
    font-size: 11px;
    font-weight: bold;
    letter-spacing: 1px;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    padding-bottom: 4px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Courier Prime', monospace;
    font-size: 10px;
    margin-bottom: 6px;
    color: var(--ink-dark);
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.2);
    box-shadow: inset 0 0 3px rgba(0,0,0,0.4);
}

.legend-color.programming { background-color: var(--color-programming); }
.legend-color.architecture { background-color: var(--color-architecture); }
.legend-color.ai { background-color: var(--color-ai); }
.legend-color.dsa { background-color: var(--color-dsa); }
.legend-color.devops { background-color: var(--color-devops); }

/* Old Newspaper Modal Drawer (Slides from Right) */
.newspaper-card {
    position: absolute;
    top: 24px;
    right: 24px;
    bottom: 24px;
    width: 600px;
    background-color: var(--paper-light);
    background-image: radial-gradient(circle, rgba(240, 220, 180, 0.15) 0%, rgba(138, 110, 80, 0.15) 100%);
    border: 8px solid var(--paper-light); /* Double paper framing */
    outline: 2px solid #d4cbb8;
    box-shadow: -15px 0 35px rgba(0, 0, 0, 0.6);
    border-radius: 2px;
    z-index: 100;
    overflow-y: auto;
    transform: translateX(650px);
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: auto;
}

.newspaper-card.active {
    transform: translateX(0);
}

/* Inner Container for Printing columns */
.newspaper-inner {
    padding: 28px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.close-btn {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 28px;
    font-weight: 300;
    color: var(--ink-dark);
    cursor: pointer;
    transition: transform 0.2s;
    z-index: 10;
}

.close-btn:hover {
    transform: scale(1.15) rotate(90deg);
}

/* Vintage Newspaper Header Columns */
.newspaper-header {
    margin-bottom: 20px;
}

.issue-info {
    display: flex;
    justify-content: space-between;
    font-family: 'Courier Prime', monospace;
    font-size: 9px;
    color: var(--ink-faded);
    border-bottom: 1px solid var(--ink-dark);
    padding-bottom: 4px;
    margin-bottom: 8px;
    font-weight: bold;
}

.newspaper-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 38px;
    font-weight: 800;
    text-transform: uppercase;
    text-align: center;
    line-height: 1.1;
    color: var(--ink-dark);
    margin: 8px 0;
    letter-spacing: -1px;
}

.newspaper-divider {
    height: 5px;
    border-top: 3px solid var(--ink-dark);
    border-bottom: 1px solid var(--ink-dark);
    margin-top: 4px;
}

/* Newspaper Grid Columns */
.newspaper-body {
    display: flex;
    gap: 24px;
    flex: 1;
    overflow: visible;
}

.newspaper-column {
    display: flex;
    flex-direction: column;
}

.newspaper-column.main-col {
    flex: 1.3;
    border-right: 1.5px solid var(--ink-dark);
    padding-right: 20px;
}

.newspaper-column.side-col {
    flex: 1;
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.newspaper-column .badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 2px;
    font-family: 'Courier Prime', monospace;
    font-size: 11px;
    font-weight: bold;
    text-transform: uppercase;
    border: 1px solid var(--ink-dark);
}

.tag-meta {
    font-family: 'Courier Prime', monospace;
    font-size: 11px;
    color: var(--ink-faded);
}

.lead-paragraph {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--ink-dark);
    margin-bottom: 20px;
    text-align: justify;
    text-indent: 0;
}

.lead-paragraph::first-letter {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 52px;
    font-weight: 800;
    float: left;
    margin-top: 4px;
    margin-right: 8px;
    line-height: 0.8;
    color: var(--ink-dark);
}

/* Newspaper Subheadings */
.newspaper-subheading {
    font-family: 'Playfair Display', serif;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    border-bottom: 2px solid var(--ink-dark);
    padding-bottom: 4px;
    margin-top: 12px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

/* Bullet list style like column notes */
.concept-list {
    list-style-type: none;
    padding-left: 0;
}

.concept-list li {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--ink-dark);
    margin-bottom: 8px;
    position: relative;
    padding-left: 16px;
    text-align: justify;
}

.concept-list li::before {
    content: "■";
    font-size: 8px;
    position: absolute;
    left: 0;
    top: 5px;
    color: var(--ink-dark);
}

/* Papers Evidence Lists */
.papers-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.paper-item {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    padding: 10px 12px;
    transition: background-color 0.2s, border-color 0.2s;
    text-decoration: none;
    display: block;
}

.paper-item:hover {
    background: rgba(0, 0, 0, 0.06);
    border-color: var(--ink-dark);
}

.paper-title {
    font-family: 'Playfair Display', serif;
    font-size: 14px;
    font-weight: bold;
    color: var(--ink-dark);
    margin-bottom: 4px;
    line-height: 1.3;
}

.paper-author {
    font-family: 'Courier Prime', monospace;
    font-size: 11px;
    color: var(--ink-faded);
}

.no-papers {
    font-family: 'Courier Prime', monospace;
    font-size: 11px;
    color: var(--ink-faded);
    font-style: italic;
    padding: 10px;
    text-align: center;
    border: 1px dashed rgba(0, 0, 0, 0.15);
    background: rgba(0,0,0,0.01);
}

/* Bottom actions */
.card-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: auto;
    padding-top: 24px;
}

.btn {
    display: block;
    width: 100%;
    padding: 10px;
    border-radius: 4px;
    text-align: center;
    font-family: 'Courier Prime', monospace;
    font-size: 11px;
    font-weight: bold;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.15s, color 0.15s, border-color 0.15s;
    border: 1px solid var(--ink-dark);
}

.btn-primary {
    background-color: var(--ink-dark);
    color: var(--paper-light);
}

.btn-primary:hover {
    background-color: var(--paper-light);
    color: var(--ink-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--ink-dark);
}

.btn-secondary:hover {
    background-color: rgba(0,0,0,0.05);
}

/* Custom Scrollbar for vintage paper look */
.newspaper-card::-webkit-scrollbar {
    width: 8px;
}

.newspaper-card::-webkit-scrollbar-track {
    background: var(--paper-dark);
    border-left: 1px solid rgba(0, 0, 0, 0.08);
}

.newspaper-card::-webkit-scrollbar-thumb {
    background: #cbd0d6;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

.newspaper-card::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Responsive Scaling */
@media (max-width: 900px) {
    .newspaper-card {
        width: 100%;
        right: 0;
        top: auto;
        bottom: 0;
        height: 60vh;
        transform: translateY(650px);
        border-right: none;
        border-left: none;
    }
    
    .newspaper-card.active {
        transform: translateY(0);
    }
    
    .newspaper-body {
        flex-direction: column;
    }
    
    .newspaper-column.main-col {
        border-right: none;
        border-bottom: 1px dashed rgba(0,0,0,0.25);
        padding-right: 0;
        padding-bottom: 20px;
    }
    
    .retro-header {
        max-width: calc(100% - 48px);
        right: 24px;
    }
}