/* ═══════════════════════════════════════════════════════════════
   style.css — Hvaðan kemur fylgið?
   Design system + scrollytelling layout
   ═══════════════════════════════════════════════════════════════ */

/* ─── Google Fonts ────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Faustina:ital,wght@0,400;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500&display=swap');

/* ─── Design tokens ──────────────────────────────────────────── */
/* 
======================================================================
  FONT SIZE REFERENCE TABLE (All values in PX for easy editing)
======================================================================
  Element               | CSS Selector       | Current Size
------------------------|--------------------|------------------------
  Body (base size)      | body               | 20px
  Main Title            | h1                 | 64px
  Hero Subtitle         | #hero .subtitle    | 16px
  Hero Body Text        | .hero-body         | 24px
  Step Card Title       | .step h2           | 32px
  Step Card Text        | .step p            | 22px
  Arc Labels (Outer)    | .arc-label         | 16px
  Arc Labels (Mobile)   | .label-short       | 16px
  Retention Labels      | .retention-label   | 36px
  Filter Pills          | .pill              | 16px
  Tooltip Text          | #tooltip           | 18px
  Tooltip pct text      | #tooltip .pct      | 16px
  Footer Text           | #site-footer       | 18px
======================================================================
*/

:root {
  --bg:           #f0eeea;
  --surface:      #faf9f7;
  --surface-2:    #e8e5e0;
  --border:       #ccc9c4;
  --text-primary: #1a1818;
  --text-muted:   #6b6763;
  --accent:       #9a6200;      /* deep amber — readable on light bg */
  --accent-cool:  #3a7a9c;

  /* Party colors */
  --S: #c0392b;
  --D: #2980b9;
  --B: #27ae60;
  --C: #f39c12;
  --F: #8e44ad;
  --J: #e74c3c;
  --M: #7f8c8d;
  --P: #1abc9c;
  --A: #16a085;
  --V: #2ecc71;
  --none: #666666;

  /* Layout */
  --chart-panel-w: 52vw;
  --text-col-w:    44vw;
  --step-pad:      2rem;
  --radius:        6px;

  /* Transitions */
  --t-fast:  200ms ease;
  --t-med:   500ms ease;
  --t-slow:  800ms ease;
}

/* ─── Reset & base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 20px; /* increased to 20px */
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Typography ─────────────────────────────────────────────── */
h1, h2, h3 {
  font-family: 'Faustina', serif;
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: 64px;
  color: var(--accent);
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  line-height: 1.1;
}

h2 {
  font-size: 32px;
  color: var(--text-primary);
}

h3 {
  font-size: 24px;
  color: var(--accent);
}

p { color: var(--text-muted); }

/* ─── Hero Landing Page ──────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  position: relative;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150vw;
  height: 150vh;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  /* Use the user-provided electoral map */
  background-image: url('reykjavik.jpg');
  background-position: center center; /* Centered to fit appropriately on both wide and tall screens */
  background-size: cover;
  background-repeat: no-repeat;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

#hero .subtitle {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-body {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 24px;
  line-height: 1.6;
  color: var(--text-primary);
  max-width: 700px;
  margin: 0 auto;
}

.hero-body strong {
  color: var(--accent);
}

.scroll-prompt {
  margin-top: 4rem;
  font-size: 2rem;
  color: var(--text-muted);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-20px); }
  60% { transform: translateY(-10px); }
}

#lang-toggle {
  position: absolute;
  top: 2rem;
  right: 2rem;
  z-index: 100;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  color: var(--accent-cool);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius);
  transition: border-color var(--t-fast), color var(--t-fast);
  letter-spacing: 0.05em;
}

#lang-toggle:hover {
  border-color: var(--accent-cool);
  color: var(--text-primary);
}

/* ─── Scrollytelling layout ──────────────────────────────────── */
#scrolly-container {
  display: flex;
  align-items: flex-start;
  width: 100%;
}

/* Sticky chart panel (left) */
#chart-sticky {
  position: sticky;
  top: 0;
  width: var(--chart-panel-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  border-right: 1px solid var(--border);
  flex-shrink: 0;
  overflow: hidden;
}

#dynamic-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 800ms ease, background-image 800ms ease;
  z-index: -1;
  pointer-events: none;
}

#chart-svg-wrapper {
  width: 100%;
  max-width: 700px;
  aspect-ratio: 1;
  position: relative;
}

#chart {
  width: 100%;
  height: auto;
  display: block;
}

/* Beat caption below chart */
#beat-caption {
  margin-top: 1.2rem;
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  min-height: 1.4em;
  transition: opacity var(--t-med);
}

/* Scroll steps column (right) */
#scroll-steps {
  width: var(--text-col-w);
  padding: 0 3rem;
  flex-shrink: 0;
}

/* ─── Scroll step cards ──────────────────────────────────────── */
.step {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--step-pad) 0;
  opacity: 0.35;
  transition: opacity var(--t-med);
}

.step.is-active {
  opacity: 1;
}

.step-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 24px;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.step h2 {
  margin-bottom: 12px;
  font-size: 32px;
}

.step p {
  font-size: 22px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 42ch;
}

/* ─── Filter pills (Beat 4 — interactive outro) ──────────────── */
#filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.4rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-med);
}

#filter-bar.visible {
  opacity: 1;
  pointer-events: all;
}

.pill {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  letter-spacing: 0.04em;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
}

.pill:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.pill.active {
  background: var(--pill-color, var(--text-primary));
  border-color: var(--pill-color, var(--text-primary));
  box-shadow: 0 0 8px var(--pill-color, transparent);
  color: #fff;
}

.pill.active[data-filter="all"], .pill.active[data-filter="top3"] {
  background: var(--text-primary);
  border-color: var(--text-primary);
  box-shadow: none;
}

/* ─── Tooltip ────────────────────────────────────────────────── */
#tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 100;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 18px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 18px;
  line-height: 1.5;
  color: var(--text-primary);
  max-width: 320px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  transition: opacity var(--t-fast);
}

#tooltip[hidden] { display: none; }

#tooltip .from { font-weight: 500; }
#tooltip .arrow { color: var(--accent); margin: 0 0.35em; }
#tooltip .to   { font-weight: 500; }
#tooltip .pct  { color: var(--accent-cool); margin-top: 6px; font-size: 16px; }

/* ─── Footer ─────────────────────────────────────────────────── */
#site-footer {
  padding: 3rem 2rem;
  background-color: var(--surface-2);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  flex-wrap: wrap;
}

#site-footer .source {
  font-size: 16px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

#site-footer .credit {
  font-family: 'Faustina', serif;
  font-style: normal;
  font-weight: 600;
  font-size: 24px;
  color: var(--text-primary);
}

/* ─── Arc labels (D3 SVG text) ───────────────────────────────── */
.arc-label {
  font-family: 'Faustina', serif;
  font-size: 16px;
  font-weight: 600;
  fill: var(--text-primary);
  pointer-events: none;
  transition: opacity var(--t-med);
}

.arc-label.dimmed {
  opacity: 0.25;
}

.label-short { display: none; }

@media (max-width: 640px) {
  .label-full { display: none; }
  .label-short { display: inline; }
}

/* ─── Retention Labels (Beat 1) ──────────────────────────────── */
.retention-label {
  font-family: 'Faustina', serif;
  font-size: 36px;
  font-weight: 700;
  pointer-events: none;
  transition: opacity var(--t-med);
}

/* ─── Chord ribbons ──────────────────────────────────────────── */
.chord {
  transition: opacity var(--t-med);
  cursor: pointer;
}

.chord:hover { opacity: 0.9 !important; }

/* ─── Arc groups ─────────────────────────────────────────────── */
.arc-path {
  transition: opacity var(--t-med), stroke-width var(--t-med);
  stroke: var(--bg);
  stroke-width: 1;
}

/* ─── Progress indicator ─────────────────────────────────────── */
#progress-dots {
  position: fixed;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 50;
}

.progress-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--t-fast), transform var(--t-fast);
}

.progress-dot.active {
  background: var(--accent);
  transform: scale(1.4);
}

/* ─── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ─── Mobile (≤640px) ─────────────────────────────────────────── */
@media (max-width: 640px) {
  #hero {
    min-height: auto;
    padding: 4rem 1.5rem;
  }
  
  .scroll-prompt {
    margin-top: 2rem;
  }

  #scrolly-container {
    flex-direction: column;
  }

  #chart-sticky {
    position: sticky;
    top: 0;
    width: 100%;
    height: 50vh; /* Fixed height for the chart area on mobile */
    min-height: 300px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    z-index: 10;
    background: var(--bg);
  }

  #chart-svg-wrapper {
    max-width: 100%;
  }

  #scroll-steps {
    width: 100%;
    padding: 0 1.25rem;
  }

  .step {
    min-height: 70vh;
    opacity: 1;
  }

  #progress-dots { display: none; }
  #lang-toggle { position: static; margin-top: 0.5rem; display: inline-block; }
  #site-footer { padding: 1.5rem 1.25rem; }
}

/* ─── Tablet (641–900px) ─────────────────────────────────────── */
@media (min-width: 641px) and (max-width: 900px) {
  :root {
    --chart-panel-w: 48vw;
    --text-col-w:    48vw;
  }

  #scroll-steps { padding: 0 1.5rem; }
}

/* ─── Retention Section ───────────────────────────────────────── */
#retention-section {
  padding: 8rem 2rem;
  background-color: var(--surface-1);
  border-top: 1px solid var(--border);
}

.retention-container {
  max-width: 900px;
  margin: 0 auto;
}

#retention-title {
  font-family: 'Faustina', serif;
  font-size: 48px;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  text-align: center;
}

.retention-intro {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.retention-grid {
  width: 100%;
  border-collapse: collapse;
  border-top: 2px solid var(--text-primary);
  border-bottom: 2px solid var(--text-primary);
}

.retention-grid tr {
  border-bottom: 1px solid var(--border);
}

.retention-grid tr:last-child {
  border-bottom: none;
}

.retention-grid td {
  padding: 0.35rem 0.25rem;
  vertical-align: middle;
}

.retention-grid .rank {
  width: 30px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
}

.retention-grid .party-cell {
  font-family: 'Faustina', serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  width: 190px; /* Reduced from 220px to make bars wider */
  display: flex;
  align-items: center;
}

.retention-grid .party-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 8px;
  flex-shrink: 0;
}

.retention-grid .bar-cell {
  width: 100%;
  position: relative;
}

.retention-grid .bar-cell::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 48.1%;
  border-left: 1px dashed var(--border);
  z-index: 0;
}

.retention-grid .bar-bg {
  width: 100%;
  height: 14px; /* Taller bars */
  background: transparent;
  border: 1px solid var(--border); /* Slight border */
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.retention-grid .bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.retention-grid .value-cell {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  font-weight: 500;
  text-align: right;
  padding-left: 1rem;
  color: var(--text-primary);
}

/* ─── End Screen ─────────────────────────────────────────────── */
#end-screen {
  padding: 6rem 2rem 8rem;
  background-color: #0f172a; /* Dark background */
  text-align: center;
}

.end-container {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.end-credits {
  font-family: 'Faustina', serif;
  color: #f8fafc;
}

.end-credits .credit-text {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.end-credits .source-text {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  color: #94a3b8;
}

.end-actions {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  font-weight: 400;
  text-decoration: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background-color: #f8fafc;
  color: #0f172a;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.btn-ghost {
  background-color: transparent;
  color: #f8fafc;
  border-color: #475569;
}

.btn-ghost:hover {
  border-color: #f8fafc;
  transform: translateY(-2px);
}