:root {
  /* Primary Brand Colors */
  --brand-red: #ec1a3c;
  --brand-yellow: #f3b54a;
  --brand-green: #01752d;
  --brand-teal: #02a69e;
  --brand-navy: #061531;
  --brand-white: #f4f4f4;
  --brand-black: #000000;
  --brand-blue: #1a3070;
  --brand-grey: #eaeaea;

  /* D4PG Colors */
    --d4pg-navy: #051335;      /* Darker navy for main background */
    --d4pg-blue: #1f3070;      /* Slightly lighter blue for layering */
    --d4pg-light-blue: #989fd5; /* Light blue/purple background */
    --d4pg-coral: #ff7f6d;     /* Coral/orange for buttons & accents */
    --d4pg-yellow: #f3e04b;    /* Yellow accent */
    --d4pg-green: #4adb97;     /* Green accent */
    --d4pg-pink: #ff3dc8;      /* Pink accent */
    --d4pg-white: #ffffff;     /* White text */

  /* Metallic Foundation System - Light Theme */
  --metal-pearl: #f8f9fa;
  --metal-platinum: #e8eaed;
  --metal-silver: #d1d5db;
  --metal-chrome: #9ca3af;
  --metal-navy-accent: #2d3748;

  /* Light Theme Palette */
  --bg:       #ffffff;
  --surface:  #f8f9fa;
  --border:   #e0e6e8;
  --trunk:    #02a69e;
  --trunk2:   #02a69e;
  --glow:     rgba(2,166,158,0.12);
  --text:     #1a1a1a;
  --muted:    #666666;
  --white:    #ffffff;

  /* branch palette - light theme with teal */
  --c1: #02a69e;  /* free software — brand teal */
  --c2: #f3b54a;  /* linux — brand yellow */
  --c3: #02a69e;  /* open web — brand teal */
  --c4: #1a3070;  /* commercial — brand blue */
  --c5: #02a69e;  /* cloud — brand teal */
  --c6: #ec1a3c;  /* AI — brand red */
  --c7: #ec1a3c;  /* daily life — brand red */

  /* Font Families */
  --font-primary: "All Round Gothic", Arial, sans-serif;
  --font-secondary: "Proxima Nova", sans-serif;
  --font-accent: "Poppins", "Helvetica Neue", Arial, sans-serif;

  /* Spacing Variables */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 5rem;

  /* Border Radius */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;

  /* Shadows */
  --shadow-sm: 0 2px 10px rgba(0,0,0,0.08);
  --shadow-md: 0 10px 30px rgba(0,0,0,0.12);
  --shadow-lg: 0 30px 60px rgba(0,0,0,0.15);

  /* Animation Speeds */
  --speed-fast: 180ms;
  --speed-med: 320ms;
  --speed-slow: 560ms;
}

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

html { scroll-behavior: smooth; }

section {
  background: #ffffff;
  background-image: 
    linear-gradient(#3333330f 1px, transparent 1px),
    linear-gradient(90deg, #3333330f 1px, transparent 1px);
  background-size: 25px 25px;
  color: var(--text);
  font-family: var(--font-primary);
  overflow-x: hidden;
  cursor: default;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}



/* ── TCIA SITE NAV ────────────────────── */
.tcia-nav {
  position: sticky;
  top: 0;
  z-index: 8500;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  height: 80px;
}

.tcia-nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

  .tcia-nav-logo img {
            height: 70px;
            width: auto;
            background: white;
            padding: 4px 8px;
            border-radius: 4px;
        }

.tcia-nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.tcia-nav-links a {
  font-family: var(--font-secondary);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-black);
  text-decoration: none;
  transition: color var(--speed-fast);
  border-bottom: 1.5px solid transparent;
}

.tcia-nav-cta {
  background: var(--d4pg-pink);
  font-family: var(--font-secondary);
  font-size: 0.56rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--speed-fast);
  box-shadow: var(--shadow-sm);
}

/* ── D4PG CONTEXT BANNER ─────────────────── */
.d4pg-banner {
  background: linear-gradient(135deg, rgba(2,166,158,0.06) 0%, rgba(1,117,45,0.04) 100%);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.d4pg-banner-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.d4pg-badge {
  background: rgba(2,166,158,0.15);
  border: 1px solid rgba(2,166,158,0.4);
  color: var(--trunk);
  font-family: var(--font-secondary);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-xs);
}

.d4pg-banner-text {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}

.d4pg-banner-text strong {
  color: var(--text);
  font-weight: 500;
}

.d4pg-banner-link {
  font-family: var(--font-secondary);
  font-size: 0.56rem;
  letter-spacing: 0.12em;
  color: var(--trunk);
  text-decoration: none;
  border: 1px solid rgba(2,166,158,0.4);
  padding: 7px 16px;
  border-radius: var(--radius-xs);
  white-space: nowrap;
  transition: all var(--speed-fast);
  background: transparent;
}

.d4pg-banner-link:hover { 
  background: rgba(2,166,158,0.12);
  border-color: var(--trunk);
}

/* ── COMMUNITY FRAMING PANEL ─────────────── */


.community-panel {
  background: var(--brand-white);
  border: 1px solid rgba(2,166,158,0.15);
  border-left: 4px solid var(--c-accent, var(--trunk));
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin: 14px 0 4px;
  box-shadow: var(--shadow-sm);
  z-index: 2;
  position: relative;
}

.community-panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.cp-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs);
  background: rgba(2,166,158,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  color: var(--trunk);
}

.cp-label {
  font-family: var(--font-secondary);
  font-size: 0.56rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--trunk);
  font-weight: 700;
}

.community-panel p {
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--muted);
  font-family: var(--font-primary);
  font-weight: 400;
}

.community-panel p strong {
  color: var(--text);
  font-weight: 600;
}

.cp-stakes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.cp-stake {
  font-family: var(--font-secondary);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: 12px;
  border: 1px solid;
  background: rgba(255, 255, 255, 0.5);
}

/* ── OPPORTUNITY FRAMING (card panel) ─── */
.opportunity-panel {
  background: rgba(2,166,158,0.08);
  border: 1px solid rgba(2,166,158,0.2);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-top: 8px;
}

.op-label {
  font-family: var(--font-secondary);
  font-size: 0.54rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--trunk);
  font-weight: 700;
  margin-bottom: 6px;
}

.op-body {
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--muted);
  font-family: var(--font-primary);
  font-weight: 400;
}

.op-body strong { color: var(--text); font-weight: 600; }

/* ── HEADER ─────────────────────────────── */
header {
  text-align: center;
  padding: 80px 24px 60px;
  position: relative;
}

.header-eyebrow {
  font-family: var(--font-secondary);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--trunk);
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 600;
}

h1 {
  font-family: var(--font-accent);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.08;
  letter-spacing: -0.015em;
}

h1 em {
  font-style: italic;
  color: var(--trunk);
  font-weight: 500;
}

.header-sub {
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  font-family: var(--font-primary);
}

.hint {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  letter-spacing: 0.08em;
  font-family: var(--font-secondary);
  background: rgba(255, 255, 255, 0.4);
}

.hint span { color: var(--trunk); font-weight: 600; }

/* ── TRUNK LINE ─────────────────────────── */
.timeline {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 120px;
}

.trunk-line {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom,
    var(--trunk) 0%,
    var(--trunk) 75%,
    rgba(2,166,158,0.15) 92%,
    transparent 100%
  );
  box-shadow: 0 0 16px rgba(2,166,158,0.2);
}

/* ── YEAR BADGE ─────────────────────────── */
.year-badge {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  margin: 10px 0 4px;
  pointer-events: none;
}

.year-badge .yr {
  background: white;
  border: 2px solid var(--trunk);
  color: var(--trunk);
  font-family: var(--font-secondary);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 5px 16px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* ── ROW ────────────────────────────────── */
.row {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  align-items: start;
  margin-bottom: 6px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.row.visible { opacity: 1; transform: translateY(0); }

/* center spine cell */
.spine {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 20px;
}

.spine-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--bg);
  border: 2.5px solid var(--c, var(--trunk));
  box-shadow: 0 0 12px color-mix(in srgb, var(--c, var(--trunk)) 50%, transparent);
  flex-shrink: 0;
  z-index: 5;
}

/* left / right cell */
.cell-left  { display: flex; justify-content: flex-end; padding-right: 24px; padding-bottom: 24px; }
.cell-right { display: flex; justify-content: flex-start; padding-left: 24px; padding-bottom: 24px; }
.cell-empty { padding-bottom: 24px; }

/* ── MILESTONE CARD ──────────────────────── */
.card {
  width: 100%;
  max-width: 480px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--speed-med), transform var(--speed-med), border-color var(--speed-med);
  cursor: pointer;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--trunk);
  box-shadow: 0 12px 32px rgba(2,166,158,0.15);
}

.card-header {
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.card-avatar {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--c, var(--trunk)) 14%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--c, var(--trunk)) 30%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.card-meta { flex: 1; min-width: 0; }

.card-tag {
  font-family: var(--font-secondary);
  font-size: 0.55rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c, var(--trunk));
  margin-bottom: 4px;
  font-weight: 600;
}

.card-title {
  font-family: var(--font-accent);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
}

.card-year-small {
  font-family: var(--font-secondary);
  font-size: 0.6rem;
  color: var(--muted);
  margin-top: 3px;
}

/* summary always visible */
.card-summary {
  padding: 12px 16px;
  font-size: 0.73rem;
  line-height: 1.65;
  color: var(--muted);
  font-family: var(--font-primary);
  font-weight: 400;
  border-bottom: 1px solid var(--border);
}

/* expandable panels */
.card-panels {
  display: none;
}

.card.open .card-panels { display: block; }

.panel {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.panel:last-child { border-bottom: none; }

.panel-head {
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  background: transparent;
  transition: background 0.15s;
}

.panel-head:hover { background: rgba(2,166,158,0.04); }

.panel-icon {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  background: color-mix(in srgb, var(--c, var(--trunk)) 12%, transparent);
  flex-shrink: 0;
}

.panel-label {
  font-family: var(--font-secondary);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c, var(--trunk));
  flex: 1;
  font-weight: 600;
}

.panel-arrow {
  font-size: 0.65rem;
  color: var(--muted);
  transition: transform 0.2s;
}

.panel.open .panel-arrow { transform: rotate(90deg); }

.panel-body {
  display: none;
  padding: 0 16px 14px;
  font-size: 0.73rem;
  line-height: 1.7;
  color: var(--muted);
  font-family: var(--font-primary);
  font-weight: 400;
}

.panel.open .panel-body { display: block; }

.bio-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 5px 10px;
  margin-bottom: 8px;
}

.bio-key {
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  padding-top: 1px;
}

.bio-val {
  font-size: 0.7rem;
  color: var(--text);
}

.solutions-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.solutions-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.7rem;
  line-height: 1.5;
  color: var(--muted);
}

.solutions-list li::before {
  content: '◆';
  font-size: 0.45rem;
  color: var(--c, var(--trunk));
  margin-top: 4px;
  flex-shrink: 0;
}

.impact-bar-wrap {
  margin-top: 8px;
}

.impact-label {
  font-family: var(--font-secondary);
  font-size: 0.55rem;
  color: var(--muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 5px;
}

.impact-bar {
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  overflow: hidden;
  margin-bottom: 3px;
}

.impact-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: color-mix(in srgb, var(--c, var(--trunk)) 80%, transparent);
  width: 0;
  transition: width 0.8s ease 0.1s;
}

.impact-bar-label {
  font-size: 0.6rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}

/* expand toggle at bottom of card */
.card-toggle {
  padding: 9px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  border-top: 1px solid var(--border);
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.15s, background 0.15s;
  user-select: none;
}

.card-toggle:hover { color: var(--c, var(--trunk)); background: rgba(2,166,158,0.04); }

.card-toggle .toggle-icon { transition: transform 0.25s; }
.card.open .card-toggle .toggle-icon { transform: rotate(180deg); }

/* ── BRANCH HEADER ────────────────────── */
.branch-header {
  position: relative;
  display: flex;
  align-items: center;
  margin: 20px 0 6px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s, transform 0.5s;
}

.branch-header.visible { opacity: 1; transform: translateY(0); }

.branch-header.right .blabel { margin-left: calc(50% + 24px); }
.branch-header.left  .blabel { margin-right: calc(50% + 24px); margin-left: auto; text-align: right; }

.blabel {
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--c, var(--trunk));
  padding: 5px 12px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--c, var(--trunk)) 10%, transparent);
  border-left: 3px solid var(--c, var(--trunk));
}

.branch-header.left .blabel {
  border-left: none;
  border-right: 3px solid var(--c, var(--trunk));
}

/* ── TODAY ──────────────────────────── */
.today-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 30px 0;
}

.today-ring {
  position: absolute;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--trunk);
  animation: ripple 2.2s ease-out infinite;
}

.today-ring:nth-child(2) { animation-delay: 0.7s; }

.today-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--trunk);
  box-shadow: 0 0 22px var(--trunk);
  z-index: 2;
}

.today-label {
  position: absolute;
  right: calc(50% + 28px);
  font-family: var(--font-secondary);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--trunk);
  text-transform: uppercase;
  white-space: nowrap;
}

@keyframes ripple {
  0%   { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.8); opacity: 0; }
}

/* ── LEGEND ─────────────────────────── */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  padding: 24px 24px 70px;
  max-width: 70vw;
  margin: 0 auto;
}

.leg {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.leg-dot { 
  width: 8px; 
  height: 8px; 
  border-radius: 50%; 
  flex-shrink: 0; }

/* ── CITATION LINKS ──────────────────── */
a.cite {
  color: var(--c7);
  font-family: var(--font-secondary);
  font-size: 0.6rem;
  text-decoration: none;
  border-bottom: 1px dashed color-mix(in srgb, var(--c7) 50%, transparent);
  padding: 0 2px;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
a.cite:hover { color: var(--trunk); border-bottom-color: var(--trunk); }

sup { vertical-align: super; font-size: 0.55em; }

/* ── DAILY LIFE CARD extra ──────────────── */
.daily-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 6px;
}

@media (max-width: 500px) { .daily-grid { grid-template-columns: 1fr; } }

.daily-item {
  background: color-mix(in srgb, var(--c7) 6%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--c7) 18%, transparent);
  border-radius: 7px;
  padding: 10px 12px;
}

.daily-item-icon { font-size: 1.1rem; margin-bottom: 4px; }

.daily-item-name {
  font-family: var(--font-secondary);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}

.daily-item-desc {
  font-size: 0.66rem;
  line-height: 1.5;
  color: var(--muted);
  font-family: var(--font-primary);
}

/* ── REFERENCES ────────────────────── */
.references {
  max-width: 70vw;
  margin: 0 auto 80px;
  padding: 0 24px;
}

.references-title {
  font-family: var(--font-accent);
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 700;
}

.references-sub {
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.ref-divider {
  height: 1px;
  background: var(--border);
  margin-bottom: 24px;
}

.ref-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ref-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: start;
}

.ref-num {
  font-family: var(--font-secondary);
  font-size: 0.6rem;
  color: var(--c7);
  font-weight: 700;
  padding-top: 2px;
  letter-spacing: 0.05em;
}

.ref-text {
  font-size: 0.71rem;
  line-height: 1.7;
  color: var(--muted);
  font-family: var(--font-primary);
  font-weight: 400;
}

.ref-text em { font-style: italic; color: #999999; }

.ref-text a {
  color: var(--c7);
  text-decoration: none;
  word-break: break-all;
}

.ref-text a:hover { text-decoration: underline; }


@media (max-width: 680px) {
  .trunk-line { left: 20px; }
  .timeline { padding: 0 12px 80px; }

  .row {
    grid-template-columns: 40px 1fr;
    grid-template-areas: "spine card";
  }

  .spine { grid-area: spine; }
  .cell-left, .cell-right {
    grid-area: card;
    padding-left: 12px;
    padding-right: 0;
    justify-content: flex-start;
  }
  .cell-empty { display: none; }

  .card { max-width: 100%; }

  .year-badge { justify-content: flex-start; padding-left: 6px; }

  .branch-header.right .blabel,
  .branch-header.left  .blabel {
    margin-left: 40px;
    margin-right: 0;
    text-align: left;
    border-left: 3px solid var(--c, var(--trunk));
    border-right: none;
  }

  .today-label { display: none; }
}


/* ── UTILITY CLASSES ────────────────────── */
.hidden {
  display: none !important;
}

/* ── PAGE NAV ─────────────────────────────────────── */
#page-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 8000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 16px;
}

.nav-btn {
  font-family: var(--font-secondary);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all var(--speed-fast);
  white-space: nowrap;
}

.nav-btn:hover { color: var(--trunk); border-color: var(--trunk); }
.nav-btn.active { background: linear-gradient(135deg, var(--brand-teal), var(--brand-green)); color: white; border-color: transparent; }

/* spacer so content isn't hidden under nav */
#timeline-page { padding-top: 54px; }
#resource-page  { padding-top: 54px; display: none; }

/* ── RESOURCE PAGE SHELL ──────────────────────────── */
#resource-page {
  min-height: 100vh;
  background: #ffffff;
  background-image: 
    linear-gradient(#3333330f 1px, transparent 1px),
    linear-gradient(90deg, #3333330f 1px, transparent 1px);
  background-size: 25px 25px;
  color: var(--text);
  font-family: var(--font-primary);
}

.rp-header {
  text-align: center;
  padding: 60px 24px 40px;
  border-bottom: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
}

.rp-eyebrow {
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  color: var(--brand-red);
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 700;
}

.rp-title {
  font-family: var(--font-accent);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}

.rp-title em { 
  font-style: italic; 
  color: var(--trunk); 
  font-weight: 500; 
}

.rp-sub {
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--muted);
  font-family: var(--font-secondary);
  letter-spacing: 0.1em;
}

/* ── TCIA Activate CTA ── */
#CTA {
  max-width: 70vw;
  margin:0 auto 20px;
  padding:0 24px;
}

.cta-box {
  background: var(--d4pg-blue);
  border: 1px solid var(--d4pg-blue);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  text-align: center;
}

.cta-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--brand-white);
  margin-bottom: 14px;
  font-weight: 600;
}

.cta-title {
  font-family: 'Roboto', serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--d4pg-white);
  line-height: 1.2;
  margin-bottom: 14px;
}

.cta-title em {
  color: var(--d4pg-pink);
  font-weight: 400;
}

.cta-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: var(--d4pg-white);
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto 24px;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--speed-fast);
}

.cta-btn-primary {
  background: var(--d4pg-coral);
  color: var(--brand-blue)
}

.cta-btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.cta-btn-secondary {
  background: transparent;
  color: var(--d4pg-pink);
  border: 1.5px solid var(--d4pg-pink);
}

.cta-btn-secondary:hover {
  border-color: var(--d4pg-pink);
  background: rgba(186, 61, 180, 0.6);
}

.cta-contact {
  margin-top: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  color: var(--d4pg-white);
  letter-spacing: 0.12em;
}

.rp-cta-box {
  background: var(--d4pg-blue);
  border: 1px var(--d4pg-blue);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.rp-cta-container {
  max-width: 70vw;
  margin: 2rem auto 0;
  padding: 0 24px 60px;
}

.rp-cta-content {
  flex: 1;
  min-width: 260px;
}

.rp-cta-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--d4pg-pink);
  margin-bottom: 8px;
  font-weight: 600;
}

.rp-cta-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--d4pg-white);
  line-height: 1.2;
  margin-bottom: 6px;
}

.rp-cta-desc {
  font-size: 0.8rem;
  color: var(--d4pg-white);
  line-height: 1.6;
  margin: 0;
}

.rp-cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.rp-cta-btn {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  text-transform: uppercase;
  padding: 11px 22px;
  border-radius: 6px;
  text-decoration: none;
  white-space: nowrap;
  border: none;
  cursor: pointer;
  transition: all var(--speed-fast);
  font-size: 0.58rem;
}

.rp-cta-btn-primary {
  background: var(--d4pg-coral);
  color: #0a0f0b;
  letter-spacing: 0.12em;
}

.rp-cta-btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.rp-cta-btn-secondary {
  background: transparent;
  color: var(--d4pg-pink);
  border: 1px solid var(--d4pg-pink);
  letter-spacing: 0.1em;
  text-align: center;
}

.timeline-spacer {
  height: 20px;
}

.rp-cta-btn-secondary:hover {
  border-color: var(--d4pg-pink);
  background: rgba(186, 61, 180, 0.6);
}

/* ── LEGEND BAR ─────────────────────────────────── */
.tier-legend {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 20px 24px 0;
  max-width: 1100px;
  margin: 0 auto;
}

.tier-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-secondary);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 5px 13px;
  border-radius: 20px;
  border: 1px solid;
  font-weight: 700;
}

.tier-pill.good    { color: #3ddc84; border-color: rgba(61,220,132,0.3); background: rgba(61,220,132,0.07); }
.tier-pill.better  { color: #4fc3f7; border-color: rgba(79,195,247,0.3); background: rgba(79,195,247,0.07); }
.tier-pill.best    { color: #f5a623; border-color: rgba(245,166,35,0.3);  background: rgba(245,166,35,0.07); }
.tier-pill.worst   { color: #ef5350; border-color: rgba(239,83,80,0.3);   background: rgba(239,83,80,0.07); }

/* ── CATEGORY FILTER ─────────────────────────────── */
.cat-filter {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 20px 24px 0;
  max-width: 1100px;
  margin: 0 auto;
}

.cat-btn {
  font-family: var(--font-secondary);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all var(--speed-fast);
  font-weight: 600;
}

.cat-btn:hover  { color: var(--trunk); border-color: var(--trunk); }
.cat-btn.active { color: var(--brand-blue); border-color: var(--brand-red); background: rgba(236,26,60,0.15); }

/* ── CARDS GRID ──────────────────────────────── */
.rp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
  max-width: 1200px;
  margin: 26px auto 0;
  padding: 0 24px 80px;
}

/* ── SOLUTION CARD ───────────────────────────── */
.sol-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--speed-med), box-shadow var(--speed-med), border-color var(--speed-med);
}

.sol-card:hover {
  transform: translateY(-4px);
  border-color: var(--trunk);
  box-shadow: 0 12px 32px rgba(2,166,158,0.15);
}

.sol-card-head {
  padding: 14px 16px 12px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(2,166,158,0.03) 0%, rgba(2,166,158,0.01) 100%);
}

.sol-icon-wrap {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.sol-head-meta { flex: 1; min-width: 0; }

.sol-cat {
  font-family: var(--font-secondary);
  font-size: 0.54rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--trunk);
  margin-bottom: 4px;
  font-weight: 700;
}

.sol-name {
  font-family: var(--font-accent);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

/* tier badge on card */
.sol-tier {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-secondary);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 12px;
  margin-top: 5px;
  flex-shrink: 0;
  align-self: flex-start;
}

.sol-tier.good   { color: #3ddc84; background: rgba(61,220,132,0.12);  border: 1px solid rgba(61,220,132,0.25); }
.sol-tier.better { color: #4fc3f7; background: rgba(79,195,247,0.12);  border: 1px solid rgba(79,195,247,0.25); }
.sol-tier.best   { color: #f5a623; background: rgba(245,166,35,0.12);  border: 1px solid rgba(245,166,35,0.25); }
.sol-tier.worst  { color: #ef5350; background: rgba(239,83,80,0.12);   border: 1px solid rgba(239,83,80,0.25); }

/* ── SCORES GRID ─────────────────────────────── */
.sol-scores {
  padding: 12px 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.score-item { display: flex; flex-direction: column; gap: 4px; }

.score-label {
  font-family: var(--font-secondary);
  font-size: 0.52rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.score-bar-wrap { display: flex; align-items: center; gap: 6px; }

.score-bar {
  flex: 1;
  height: 5px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.score-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s ease;
}

.score-num {
  font-family: var(--font-secondary);
  font-size: 0.55rem;
  color: var(--muted);
  width: 22px;
  text-align: right;
  font-weight: 600;
}

/* ── SKILL BADGE ─────────────────────────────── */
.skill-band {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.skill-label {
  font-family: var(--font-secondary);
  font-size: 0.54rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  font-weight: 700;
}

.skill-track {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  position: relative;
  overflow: visible;
}

.skill-fill {
  position: absolute;
  left: 0; top: 0;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, #3ddc84, #f5a623);
}

.skill-dot {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #f5a623;
  border: 2px solid white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.skill-ends {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-secondary);
  font-size: 0.5rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 4px;
  font-weight: 600;
}

/* ── WHAT IT COVERS ──────────────────────────── */
.sol-covers {
  padding: 10px 16px 14px;
}

.covers-label {
  font-family: var(--font-secondary);
  font-size: 0.52rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 700;
}

.covers-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.covers-list li {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  font-size: 0.7rem;
  color: var(--muted);
  line-height: 1.6;
  font-family: var(--font-primary);
  font-weight: 400;
}

.covers-list li .ci {
  font-size: 0.7rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.covers-list li .cv {
  font-weight: 600;
  color: var(--text);
  margin-right: 3px;
  font-family: var(--font-secondary);
  font-size: 0.6rem;
}

/* worst card red accent */
.sol-card.worst-card { border-color: rgba(236,26,60,0.3); }
.sol-card.worst-card .sol-card-head { background: rgba(236,26,60,0.06); }

/* hidden state for filtering */
.sol-card.hidden { display: none; }

/* ── SCORE COLOUR HELPERS ────────────────────────── */
.fill-green  { background: #3ddc84; }
.fill-blue   { background: #4fc3f7; }
.fill-amber  { background: #f5a623; }
.fill-red    { background: #ef5350; }
.fill-purple { background: #ce93d8; }
.fill-pink   { background: #f06292; }

@media (max-width: 640px) {
  .rp-grid { grid-template-columns: 1fr; padding: 0 14px 60px; }
  .sol-scores { grid-template-columns: 1fr; }
}