/* ==========================================================================
   AXIOM QUANT — RESEARCH PORTAL & HUMAN READING SURFACE
   SPECTRAL EQUILIBRIUM v2.0 (HIGH CONTRAST & MAXIMUM LEGIBILITY)
   ========================================================================== */

:root {
    --bg-dark: #07090E;
    --sidebar-bg: #0B0E17;
    --content-bg: #0F1420;
    --card-bg: #141A29;
    --border-color: rgba(51, 65, 85, 0.45);
    
    --cyan: #00F0FF;
    --gold: #E5B958;
    --white: #FFFFFF;
    --slate: #E2E8F0;
    --muted: #94A3B8;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
}

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

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    color: var(--slate);
    font-family: var(--font-sans);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

/* Portal Grid Layout */
.portal-layout {
    display: grid;
    grid-template-columns: 310px 1fr;
    min-height: 100vh;
}

/* SIDEBAR NAVIGATION */
.portal-sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.pulse-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
}

.brand-title {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.2em;
    color: var(--white);
    text-decoration: none;
}

.brand-title .gold { color: var(--gold); }

.sidebar-subtitle {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.2em;
    color: var(--gold);
    margin-bottom: 20px;
}

/* Search Box */
.search-box {
    margin-bottom: 24px;
}

.search-box input {
    width: 100%;
    background: #04060A;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 12px;
    color: var(--white);
    font-family: var(--font-mono);
    font-size: 11px;
    outline: none;
}

.search-box input:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

/* Sidebar Section Titles */
.sidebar-section {
    margin-bottom: 24px;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    color: var(--muted);
    margin-bottom: 10px;
}

/* Solvers Links */
.solvers-link {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--cyan);
    text-decoration: none;
    padding: 6px 10px;
    border-radius: 4px;
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.2);
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.solvers-link:hover {
    background: var(--cyan);
    color: #000;
    font-weight: 600;
}

.gold-link {
    color: var(--gold) !important;
    background: rgba(229, 185, 88, 0.08) !important;
    border-color: rgba(229, 185, 88, 0.3) !important;
}

.gold-link:hover {
    background: var(--gold) !important;
    color: #000 !important;
}

/* Paper List */
.paper-nav-list {
    list-style: none;
}

.paper-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 6px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.paper-nav-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.1);
}

.paper-nav-item.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--cyan);
}

.paper-icon { font-size: 16px; }

.paper-info {
    display: flex;
    flex-direction: column;
}

.p-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--white);
}

.p-sub {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--muted);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--gold);
}

/* MAIN READING CONTENT SURFACE */
.portal-content {
    background: var(--content-bg);
    padding: 32px 48px;
    overflow-y: auto;
}

/* Content Header */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 36px;
}

.header-breadcrumb {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--cyan);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.status-badge {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--gold);
    padding: 3px 8px;
    background: rgba(229, 185, 88, 0.1);
    border: 1px solid rgba(229, 185, 88, 0.3);
    border-radius: 3px;
}

.github-btn {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--white);
    text-decoration: none;
    padding: 5px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.2s ease;
}

.github-btn:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

/* READER SURFACE & TYPOGRAPHY */
.reader-surface {
    max-width: 820px;
    margin: 0 auto;
}

.paper-content {
    display: none;
}

.paper-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.meta-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    padding: 3px 8px;
    border-radius: 3px;
}

.meta-tag.gold { background: rgba(229, 185, 88, 0.15); color: var(--gold); border: 1px solid rgba(229, 185, 88, 0.3); }
.meta-tag.cyan { background: rgba(0, 240, 255, 0.15); color: var(--cyan); border: 1px solid rgba(0, 240, 255, 0.3); }

.meta-date {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--muted);
}

.article-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.25;
    margin-bottom: 10px;
}

.byline {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.lead-text {
    font-size: 17px;
    line-height: 1.85;
    color: var(--white);
    margin-bottom: 28px;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-top: 36px;
    margin-bottom: 16px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}

p {
    font-size: 15.5px;
    color: var(--slate);
    line-height: 1.85;
    margin-bottom: 18px;
}

/* MathJax High-Contrast */
mjx-container {
    color: var(--cyan) !important;
    font-size: 108% !important;
}

/* Styled Lists */
.styled-list {
    margin-left: 20px;
    margin-bottom: 24px;
}

.styled-list li {
    font-size: 15px;
    color: var(--slate);
    margin-bottom: 10px;
}

.styled-list li strong { color: var(--white); }

/* Code Blocks */
.code-block {
    background: #05070D;
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--cyan);
    border-radius: 6px;
    padding: 16px 20px;
    margin-bottom: 24px;
    overflow-x: auto;
}

.code-block pre code {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--cyan);
    line-height: 1.6;
}

/* Tables */
.table-wrapper {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
    margin-bottom: 28px;
}

.concept-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 12px;
}

.concept-table th {
    text-align: left;
    padding: 10px;
    color: var(--cyan);
    font-size: 10px;
    letter-spacing: 0.15em;
    border-bottom: 1px solid var(--border-color);
}

.concept-table td {
    padding: 10px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.3);
    color: var(--slate);
}

.cyan { color: var(--cyan); }
.gold { color: var(--gold); }

/* Lineage Tree */
.lineage-tree {
    background: #05070D;
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--gold);
    border-radius: 6px;
    padding: 18px 22px;
    margin-bottom: 28px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--gold);
}

/* Responsive */
@media (max-width: 900px) {
    .portal-layout { grid-template-columns: 1fr; }
    .portal-sidebar { height: auto; position: relative; }
    .portal-content { padding: 24px 20px; }
    .article-title { font-size: 24px; }
}