/* ==========================================================================
   THE HALDANKAR METHOD RESEARCH LABORATORY — MASTER CORE STYLESHEET
   Authoritative Reference: redesign roadmap.docx (Parts 6, 7, 8, 19, 23)
   Aesthetic: Dark Terminal / Archival Quantitative Finance Laboratory
   ========================================================================== */

@import url('research-tokens.css');

/* --------------------------------------------------------------------------
   1. CSS RESET & GLOBAL BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.7;
    -webkit-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* --------------------------------------------------------------------------
   2. ACCESSIBILITY & FOCUS STATES (Roadmap Part 19)
   -------------------------------------------------------------------------- */
:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--bg-surface);
    color: var(--accent-gold);
    padding: 0.5rem 1rem;
    border: 1px solid var(--accent-gold);
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    z-index: 9999;
    transition: top 0.1s ease;
}

.skip-link:focus {
    top: 1rem;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --------------------------------------------------------------------------
   3. TYPOGRAPHY SYSTEM (Roadmap Part 6 & Part 23)
   -------------------------------------------------------------------------- */
h1, h2 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.25rem, 4.5vw, 3rem); /* 36px - 48px */
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.25rem); /* 28px - 36px */
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-3);
}

h3 {
    font-family: var(--font-sans);
    font-size: 1.5rem; /* 24px */
    font-weight: 500;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

h4 {
    font-family: var(--font-sans);
    font-size: 1.25rem; /* 20px */
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.01em;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

p {
    font-size: 1rem; /* 16px */
    line-height: 1.7;
    letter-spacing: 0.01em;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    max-width: var(--max-content-width, 800px);
}

.lead-paragraph, p.lead {
    font-size: 1.25rem; /* 20px */
    font-weight: 300;
    line-height: 1.6;
    color: var(--text-primary);
    letter-spacing: 0;
    margin-bottom: var(--space-6);
}

/* Monospaced Eyebrow / Research Metadata Tags */
.research-tag, .section-eyebrow, .metadata-tag, .card-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem; /* 12px */
    font-weight: 500;
    line-height: 1.5;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
    display: inline-block;
    margin-bottom: var(--space-2);
}

.research-tag--gold, .card-tag--gold {
    color: var(--accent-gold);
}

.research-tag--crimson {
    color: var(--warning-crimson);
}

/* Citations & Footnotes */
.footnote, .citation-text {
    font-size: 0.8125rem; /* 13px */
    line-height: 1.4;
    color: var(--text-muted);
}

/* Inline Code & Technical Terms */
code, kbd, samp {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-surface);
    color: var(--text-primary);
    padding: 0.15em 0.4em;
    border: 1px solid var(--border-subtle);
    border-radius: 2px;
}

/* Links */
a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

.link-inline {
    color: var(--accent-gold);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.link-inline:hover {
    color: var(--accent-hover);
}

/* --------------------------------------------------------------------------
   4. RESEARCH STATUS SYSTEM (Roadmap Part 10)
   -------------------------------------------------------------------------- */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.2rem 0.55rem;
    border-radius: 2px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    color: var(--text-muted);
}

.status-pill--problem {
    border-color: rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.status-pill--evidence {
    border-color: rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.status-pill--finding {
    border-color: rgba(198, 162, 39, 0.35);
    color: var(--accent-gold);
}

.status-pill--limitation {
    border-color: rgba(153, 27, 27, 0.6);
    background: var(--warning-bg);
    color: #fca5a5;
}

/* --------------------------------------------------------------------------
   5. LAYOUT & CONTAINERS
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--max-site-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: clamp(1rem, 3vw, 2rem);
    padding-right: clamp(1rem, 3vw, 2rem);
}

.container-prose {
    max-width: var(--max-content-width);
    margin-left: auto;
    margin-right: auto;
}

.section {
    padding-top: clamp(3rem, 6vw, 5.5rem);
    padding-bottom: clamp(3rem, 6vw, 5.5rem);
    border-bottom: 1px solid var(--border-subtle);
}

.section-alt {
    background-color: var(--bg-surface);
}

.section-header {
    margin-bottom: var(--space-8);
}

.section-header .section-subtitle {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.6;
}

/* Grid Layout Primitives */
.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-6);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
}

.dual-column-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

@media (max-width: 860px) {
    .dual-column-grid {
        grid-template-columns: 1fr;
    }
}

/* --------------------------------------------------------------------------
   6. CARDS, PANELS & WIREFRAMES (Zero Shadows, 1px Borders)
   -------------------------------------------------------------------------- */
.card, .panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius);
    padding: clamp(1.25rem, 2.5vw, 2rem);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color var(--transition-fast);
}

.card:hover {
    border-color: var(--border-strong);
}

.card--accent-gold {
    border-left: 2px solid var(--accent-gold);
}

.card--warning {
    border-left: 2px solid var(--warning-crimson);
    background: var(--warning-bg);
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.35rem;
    margin-bottom: var(--space-3);
    line-height: 1.3;
}

.card-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   7. BUTTONS & INTERACTIVE CONTROLS
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    padding: 0.7rem 1.4rem;
    border-radius: var(--border-radius);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    min-height: 40px;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--bg-primary);
    border-color: var(--accent-hover);
}

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

.btn-secondary:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.btn-gold {
    background: var(--accent-gold);
    color: #000000;
    border-color: var(--accent-gold);
    font-weight: 600;
}

.btn-gold:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #000000;
}

.btn-sm {
    font-size: 0.75rem;
    padding: 0.45rem 0.85rem;
    min-height: 32px;
}

/* --------------------------------------------------------------------------
   8. FINANCIAL TABLES & DATA MATRICES (tabular-nums)
   -------------------------------------------------------------------------- */
.table-scroll-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius);
    background: var(--bg-surface);
    margin: var(--space-6) 0;
}

table, .data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
    font-size: 0.875rem; /* 14px */
}

table th {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    vertical-align: top;
}

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

table tr:hover td {
    background: var(--bg-surface-elevated);
}

.td-highlight-warning {
    color: #fca5a5;
    background: rgba(153, 27, 27, 0.08);
}

.td-highlight-success {
    color: #6ee7b7;
    background: rgba(6, 78, 59, 0.1);
}

/* --------------------------------------------------------------------------
   9. RESEARCH CALLOUTS & EPISTEMIC NOTICES
   -------------------------------------------------------------------------- */
.callout {
    padding: 1.25rem 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent-gold);
    border-radius: var(--border-radius);
    margin: var(--space-6) 0;
}

.callout-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent-gold);
    margin-bottom: var(--space-2);
}

.callout p:last-child {
    margin-bottom: 0;
}

.callout-limitation, .callout-warning {
    border-left-color: var(--warning-crimson);
    background: var(--warning-bg);
    border-color: var(--warning-border);
}

.callout-limitation .callout-title, .callout-warning .callout-title {
    color: #f87171;
}

.axiom-banner {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius);
    padding: 1.25rem 1.75rem;
    margin: var(--space-6) 0;
    text-align: center;
}

.axiom-text {
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.03em;
}

/* --------------------------------------------------------------------------
   10. FORMS & INPUTS (Archival Terminal Style)
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: var(--space-1);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    border-color: var(--accent-gold);
    outline: none;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.form-privacy-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-3);
    line-height: 1.5;
}

.form-privacy-note a {
    color: var(--text-secondary);
    text-decoration: underline;
}

.form-feedback {
    display: none;
    margin-top: var(--space-4);
    padding: 0.85rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    line-height: 1.5;
}

.form-feedback.success {
    display: block;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: #a7f3d0;
}

.form-feedback.error {
    display: block;
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: #fca5a5;
}

/* --------------------------------------------------------------------------
   11. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    padding: var(--space-12) 0 var(--space-8);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-heading {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   12. MOBILE RESPONSIVENESS & TOUCH TARGET AUDIT (Roadmap Part 7 & 19)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }

    .section {
        padding: clamp(2rem, 5vw, 3.5rem) 0;
    }

    .btn {
        min-height: 44px;
        padding: 0.75rem 1.25rem;
        font-size: 0.8125rem;
    }

    .btn-sm {
        min-height: 40px;
        padding: 0.5rem 1rem;
    }

    .pagination-btn {
        min-height: 48px;
        width: 100%;
    }

    .pagination-btn.is-next {
        margin-left: 0;
        text-align: left;
    }

    .form-control {
        min-height: 44px;
        font-size: 1rem; /* Prevent iOS zoom */
    }

    .table-scroll-container {
        position: relative;
        box-shadow: inset -10px 0 10px -10px rgba(0, 0, 0, 0.8);
    }
}