/* ═══════════════════════════════════════════════
   INVESTIGADORES DE LA VERDAD AMBIENTAL
   Styles — Juan Raigón & Federico Lora, 1º DAM
   ═══════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --green-900: #1a2e1a;
  --green-800: #1f3d22;
  --green-700: #2d5a32;
  --green-600: #3a7040;
  --green-500: #4a8c52;
  --green-400: #6aad72;
  --green-300: #94cc9a;
  --green-100: #e8f5e9;
  --green-50:  #f4faf5;

  --grey-900: #1a1a1a;
  --grey-800: #2c2c2c;
  --grey-700: #444444;
  --grey-500: #767676;
  --grey-300: #c0c0c0;
  --grey-100: #f0f0f0;
  --grey-50:  #f9f9f9;

  --white: #ffffff;
  --accent: #4a8c52;
  --accent-light: #e8f5e9;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Sans 3', 'Helvetica Neue', sans-serif;

  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.13);

  --nav-h: 64px;
  --max-w: 1100px;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--grey-900);
  background: var(--white);
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font-body); }

/* ── NAV ── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--green-900);
  z-index: 1000;
  border-bottom: 2px solid var(--green-700);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-brand {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--green-300);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.nav-brand i { margin-right: 6px; }

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--grey-300);
  padding: 6px 14px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  letter-spacing: 0.02em;
}
.nav-link:hover {
  background: rgba(255,255,255,0.07);
  color: var(--white);
}
.nav-link.active {
  background: var(--green-700);
  color: var(--white);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.2rem;
  padding: 6px;
}

/* ── SECTIONS ── */
main { padding-top: var(--nav-h); }
.section {
  display: none;
  min-height: calc(100vh - var(--nav-h));
  animation: fadeIn 0.35s ease;
}
.section.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── HERO ── */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 72px 24px 48px;
}
.hero-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-600);
  margin-bottom: 16px;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--grey-900);
  margin-bottom: 14px;
}
.hero-title em {
  font-style: italic;
  color: var(--green-700);
}
.hero-sub {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--grey-500);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.hero-divider {
  width: 60px;
  height: 3px;
  background: var(--green-500);
  margin-bottom: 28px;
  border-radius: 2px;
}
.hero-body {
  font-size: 1.05rem;
  color: var(--grey-700);
  max-width: 720px;
  margin-bottom: 18px;
}
.hero-body strong { color: var(--grey-900); font-weight: 600; }
.hero-body em { color: var(--green-700); font-style: italic; }

.hero-cta-group {
  margin-top: 32px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  background: var(--green-700);
  color: var(--white);
  border: none;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: var(--green-800); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--green-700);
  border: 2px solid var(--green-400);
  padding: 11px 24px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s, color 0.2s, transform 0.15s;
}
.btn-ghost:hover {
  background: var(--green-100);
  transform: translateY(-1px);
}

/* ── INTRO CARDS ── */
.intro-cards {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 72px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.intro-card {
  background: var(--grey-50);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow 0.2s;
}
.intro-card:hover { box-shadow: var(--shadow-md); }
.intro-card-icon {
  width: 44px; height: 44px;
  background: var(--green-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-700);
  font-size: 1.1rem;
  margin-bottom: 14px;
}
.intro-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--grey-900);
}
.intro-card p {
  font-size: 0.9rem;
  color: var(--grey-700);
  line-height: 1.6;
}

/* ── SECTION HEADER ── */
.section-header {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 60px 24px 36px;
  border-bottom: 1px solid var(--grey-100);
  margin-bottom: 40px;
}
.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-600);
  display: block;
  margin-bottom: 10px;
}
.section-eyebrow i { margin-right: 6px; }
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 16px;
}
.section-intro {
  font-size: 1.02rem;
  color: var(--grey-700);
  max-width: 680px;
  line-height: 1.7;
}

/* ── ISO TABLE ── */
.table-wrapper {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  overflow-x: auto;
}
.iso-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--grey-100);
}
.iso-table thead tr {
  background: var(--green-900);
  color: var(--white);
}
.iso-table th {
  padding: 14px 18px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.iso-table td {
  padding: 18px;
  vertical-align: top;
  border-bottom: 1px solid var(--grey-100);
  line-height: 1.6;
  color: var(--grey-800);
}
.iso-table tbody tr:last-child td { border-bottom: none; }
.iso-table tbody tr:hover td { background: var(--grey-50); }

.iso-table td small {
  display: block;
  color: var(--grey-500);
  font-size: 0.78rem;
  margin-top: 2px;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.badge-1 { background: var(--green-100); color: var(--green-800); }
.badge-2 { background: #fff3e0; color: #b45309; }
.badge-3 { background: #e8f4fd; color: #1565c0; }

.check-yes { color: var(--green-600); font-weight: 600; font-size: 0.88rem; }
.check-no  { color: #c0392b; font-weight: 600; font-size: 0.88rem; }
.check-yes i, .check-no i { margin-right: 4px; }

.iso-note {
  max-width: var(--max-w);
  margin: 24px auto 60px;
  padding: 0 24px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--green-50);
  border: 1px solid var(--green-300);
  border-radius: var(--radius);
  padding: 18px 22px;
  max-width: calc(var(--max-w) - 48px);
  margin-left: auto;
  margin-right: auto;
}
/* override padding conflict */
.iso-note { padding: 18px 22px; }

.iso-note i { color: var(--green-600); margin-top: 3px; flex-shrink: 0; }
.iso-note p { font-size: 0.88rem; color: var(--grey-700); line-height: 1.6; }

/* ── CASE CARDS ── */
.cards-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 72px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s, transform 0.2s;
}
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.case-card.featured {
  grid-column: 1 / -1;
}

.case-card-header {
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.case-card-header.google   { background: linear-gradient(135deg, #1a3c5e 0%, #2563a8 100%); }
.case-card-header.msc      { background: linear-gradient(135deg, #003d5b 0%, #0077a8 100%); }
.case-card-header.cicerus  { background: linear-gradient(135deg, #3a2c1a 0%, #7a5c2e 100%); }
.case-card-header.wavy     { background: linear-gradient(135deg, #0d3b3e 0%, #1a7a82 100%); }
.case-card-header.claude   { background: linear-gradient(135deg, var(--green-900) 0%, var(--green-700) 100%); }

.case-icon {
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.3rem;
  flex-shrink: 0;
}
.case-card-header h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 3px;
}
.case-tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
}

.case-card-body {
  padding: 24px 22px;
}
.case-card-body h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.case-card-body h4 i { color: var(--green-600); }
.case-card-body p {
  font-size: 0.9rem;
  color: var(--grey-700);
  line-height: 1.7;
  margin-bottom: 12px;
}
.case-card-body strong { color: var(--grey-900); font-weight: 600; }
.case-card-body em { color: var(--green-700); font-style: italic; }

.indicator-list {
  margin: 10px 0 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.indicator-list li {
  font-size: 0.88rem;
  color: var(--grey-700);
  line-height: 1.55;
  padding-left: 4px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.indicator-list li i {
  color: var(--green-500);
  margin-top: 3px;
  flex-shrink: 0;
  width: 14px;
}

.case-verdict {
  background: var(--green-50);
  border-left: 3px solid var(--green-500);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 16px;
  margin-top: 14px;
}
.case-verdict.verdict-warning {
  background: #fff8e1;
  border-left-color: #f59e0b;
}
.verdict-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green-700);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}
.verdict-warning .verdict-label { color: #92400e; }
.case-verdict p { font-size: 0.86rem; color: var(--grey-700); margin: 0; }

/* ── CONCLUSIONS ── */
.conclusions-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 72px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.conclusion-block {
  background: var(--grey-50);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
}
.conclusion-block.main-conclusion {
  grid-column: 1 / -1;
  background: var(--green-900);
  color: var(--white);
  border: none;
}
.conclusion-block.wide {
  grid-column: 1 / -1;
  border-top: 3px solid var(--green-500);
}
.conclusion-block h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.35;
}
.conclusion-block h3 i { color: var(--green-400); margin-top: 3px; flex-shrink: 0; }
.main-conclusion h3 i { color: var(--green-300); }
.conclusion-block p {
  font-size: 0.92rem;
  color: var(--grey-700);
  line-height: 1.7;
  margin-bottom: 12px;
}
.main-conclusion p { color: rgba(255,255,255,0.82); }
.main-conclusion p strong { color: var(--white); font-weight: 600; }

/* Reliability chart */
.reliability-chart {
  margin: 14px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rel-bar {
  background: var(--grey-100);
  border-radius: 6px;
  overflow: hidden;
  height: 44px;
}
.rel-fill {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: width 0.6s ease;
}
.rel-fill.full   { width: 100%; background: var(--green-600); color: var(--white); }
.rel-fill.medium { width: 80%;  background: #1565c0; color: var(--white); }
.rel-fill.low    { width: 48%;  background: #b45309; color: var(--white); }

.small-note {
  font-size: 0.8rem;
  color: var(--grey-500);
  margin-top: 8px;
}

.closing-quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--green-800);
  border-left: 3px solid var(--green-500);
  padding-left: 16px;
  margin: 20px 0 10px;
}
.authors-line {
  font-size: 0.82rem;
  color: var(--grey-500);
  font-style: italic;
  text-align: right;
}

/* ── RESPONSIVE ── */
@media (max-width: 860px) {
  .intro-cards {
    grid-template-columns: 1fr;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .case-card.featured { grid-column: unset; }
  .conclusions-grid {
    grid-template-columns: 1fr;
  }
  .conclusion-block.main-conclusion,
  .conclusion-block.wide { grid-column: unset; }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--green-900);
    border-top: 1px solid var(--green-700);
    padding: 12px 16px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }

  .hero { padding: 40px 16px 32px; }
  .hero-cta-group { flex-direction: column; }
  .btn-primary, .btn-ghost { justify-content: center; }

  .intro-cards, .table-wrapper,
  .cards-grid, .conclusions-grid,
  .section-header, .iso-note { padding-left: 16px; padding-right: 16px; }

  .iso-table th, .iso-table td { padding: 12px 12px; font-size: 0.82rem; }

  .case-card-body { padding: 18px 16px; }
}