:root {
  --primary-color: #1B365D;
  --secondary-color: #2C4D75;
  --success-color: #285E61;
  --error-color: #7B1113;
  --warning-color: #9A6700;
  --page-background: #F4F6F9;
  --surface-color: #FFFFFF;
  --surface-muted: #F8FAFC;
  --text-color: #2D3748;
  --muted-color: #64748B;
  --border-color: #E2E8F0;
  --focus-color: rgba(44, 77, 117, .22);
  --shadow: 0 4px 12px rgba(27, 54, 93, .04);
  --shadow-elevated: 0 12px 28px rgba(27, 54, 93, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text-color);
  background: var(--page-background);
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}
.site-nav { width: min(1100px, calc(100% - 40px)); margin: 0 auto; padding: 18px 0; }
.site-nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 12px 0; border-bottom: 1px solid var(--border-color); }
.site-brand { color: var(--primary-color); font-size: 1.35rem; font-weight: 800; letter-spacing: .02em; text-decoration: none; }
.site-links { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; font-size: .9rem; }
.site-links a { color: var(--primary-color); font-weight: 700; text-decoration: none; }
.site-links a:hover { color: var(--secondary-color); }
.site-footer { width: min(1100px, calc(100% - 40px)); margin: 24px auto 0; padding: 20px 0 28px; color: var(--muted-color); border-top: 1px solid var(--border-color); font-size: .84rem; }
.site-footer-inner { display: flex; justify-content: space-between; gap: 18px; align-items: center; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 14px; }
.site-footer a { color: var(--primary-color); font-weight: 700; text-decoration: none; }
.cookie-banner { position: fixed; z-index: 20; right: 18px; bottom: 18px; left: 18px; display: flex; justify-content: space-between; gap: 22px; align-items: center; padding: 16px 20px; color: var(--text-color); background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 8px; box-shadow: var(--shadow-elevated); }
.cookie-banner p { margin: 4px 0 0; color: var(--muted-color); font-size: .88rem; }
.cookie-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.cookie-actions a { color: var(--primary-color); font-size: .82rem; font-weight: 700; }
.cookie-actions .btn { white-space: nowrap; }
.legal-page { max-width: 820px; }
.legal-page h1 { margin-top: 0; }
.legal-page h2 { margin-top: 28px; font-size: 1.35rem; }
.legal-provider-frame { width: 100%; min-height: 900px; border: 0; background: var(--surface-color); }
.suggestion-page { max-width: 720px; }
.suggestion-card { max-width: 650px; margin: 0 auto; padding: 10px 0 30px; }
.suggestion-card h1 { margin-top: 0; }
.suggestion-card p { color: var(--muted-color); }
.suggestion-card form { display: grid; gap: 9px; margin-top: 26px; }
.suggestion-card label { margin-top: 8px; }
.suggestion-kicker { color: var(--success-color) !important; font-size: .8rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.suggestion-status { min-height: 24px; margin: 4px 0 0; }
.rights-form { display: grid; gap: 9px; margin-top: 18px; padding: 18px; background: var(--surface-muted); border: 1px solid var(--border-color); border-radius: 8px; }
body:has(.auth-card) { display: block; min-height: 100vh; padding: 0; }
a { color: var(--primary-color); }
h1, h2, h3 { color: var(--primary-color); font-weight: 700; }
button, input, select, textarea { font: inherit; }

.container {
  width: min(1100px, calc(100% - 40px));
  max-width: none;
  margin: 32px auto;
  padding: 32px;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.header-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}
.header-nav a,
.container > div > a,
body > .container > div:first-child > a {
  color: var(--primary-color) !important;
  font-weight: 700;
  text-decoration: none;
}
.header-nav a:hover,
.container > div > a:hover { color: var(--secondary-color) !important; }

.btn,
.button {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
  transition: all .2s ease-in-out;
}
.btn:hover,
.button:hover { transform: translateY(-1px); }
.btn-primary,
.button-primary { color: #fff !important; background: var(--primary-color) !important; border-color: var(--primary-color) !important; }
.btn-primary:hover,
.button-primary:hover { background: var(--secondary-color) !important; border-color: var(--secondary-color) !important; }
.btn-success { color: #fff; background: var(--success-color); border-color: var(--success-color); }
.btn-success:hover { background: #1F4D4F; border-color: #1F4D4F; }
.btn-create { color: #fff; background: var(--primary-color); border-color: var(--primary-color); box-shadow: 0 3px 8px rgba(27, 54, 93, .18); }
.btn-create:hover { color: #fff; background: var(--success-color); border-color: var(--success-color); box-shadow: 0 5px 12px rgba(40, 94, 97, .22); }
.header-nav .btn-create,
.header-nav .btn-create:hover { color: #FFFFFF !important; }
.btn-secondary,
.button-secondary { color: var(--primary-color) !important; background: var(--surface-color) !important; border-color: var(--secondary-color) !important; }

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  color: var(--text-color);
  background: var(--surface-color);
  border: 1px solid #CBD5E1;
  border-radius: 6px;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--secondary-color); box-shadow: 0 0 0 3px var(--focus-color); }
label { color: var(--text-color); font-weight: 700; }

.card,
.card-seccion,
.config-box,
.pregunta-box,
.resultado-box,
.auth-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.card-seccion,
.config-box,
.pregunta-box,
.resultado-box { padding: 24px; }
.card-set { background: var(--surface-color) !important; border: 1px solid var(--border-color) !important; border-radius: 8px !important; box-shadow: var(--shadow) !important; }
.card-set:hover { box-shadow: var(--shadow-elevated) !important; }
.card-set h3 { color: var(--primary-color) !important; }
.avatar-autor { background: var(--primary-color) !important; }
.tag-badge { color: var(--primary-color) !important; background: #EEF5FF !important; border-radius: 4px !important; }
.card-footer { border-top-color: var(--border-color) !important; }
.stat-text, #loader { color: var(--muted-color) !important; }

.ranking-panel { margin-top: 44px; padding-top: 32px; border-top: 1px solid var(--border-color); }
.ranking-heading { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 22px; }
.ranking-heading h2 { margin: 0; font-size: 1.7rem; }
.ranking-kicker { margin: 0 0 6px; color: var(--success-color); font-size: .78rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.ranking-note { max-width: 340px; margin: 0; color: var(--muted-color); font-size: .9rem; }
.ranking-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.ranking-card { padding: 20px; background: var(--surface-muted); border: 1px solid var(--border-color); border-radius: 8px; }
.ranking-card-header { display: flex; gap: 12px; align-items: flex-start; padding-bottom: 14px; border-bottom: 1px solid var(--border-color); }
.ranking-position { color: var(--secondary-color); font-size: 1.4rem; font-weight: 800; line-height: 1; }
.ranking-card h3 { margin: 0; font-size: 1.05rem; line-height: 1.25; }
.ranking-card-header p { margin: 4px 0 0; color: var(--muted-color); font-size: .8rem; }
.ranking-users { display: grid; gap: 10px; margin: 15px 0 0; padding: 0; list-style: none; }
.ranking-users li { display: flex; align-items: center; gap: 8px; min-width: 0; color: var(--text-color); font-size: .88rem; }
.ranking-users img, .ranking-avatar-fallback { width: 28px; height: 28px; flex: 0 0 28px; border-radius: 50%; object-fit: cover; }
.ranking-avatar-fallback { display: grid; place-items: center; color: #fff; background: var(--primary-color); font-size: .72rem; font-weight: 800; }
.ranking-user-position { width: 14px; color: var(--muted-color); font-size: .78rem; text-align: center; }
.ranking-user-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ranking-users strong { margin-left: auto; color: var(--success-color); }
.ranking-empty, .ranking-status { color: var(--muted-color); font-size: .9rem; }

#buscador-sets { width: min(300px, 100%) !important; }
.opcion-row { align-items: center; }
.opcion-label { background: var(--surface-color) !important; border: 1px solid var(--border-color) !important; border-radius: 6px !important; }
.opcion-label:hover { background: #EEF5FF !important; border-color: var(--secondary-color) !important; }
.feedback-msg.correcta,
.correcta { color: #1F4D4F !important; background: #E6F2EF !important; border-color: #B7D8D0 !important; }
.feedback-msg.incorrecta,
.incorrecta { color: var(--error-color) !important; background: #FBEAEB !important; border-color: #E7BFC2 !important; }

.auth-card {
  width: min(420px, calc(100% - 40px));
  max-width: none;
  margin: 8vh auto;
  padding: 32px;
}
.auth-card h1 { color: var(--primary-color) !important; }
.toggle-link { color: var(--muted-color) !important; }
.toggle-link a { color: var(--secondary-color) !important; }
#banner-aviso { color: var(--error-color) !important; background: #FBEAEB !important; border-color: #E7BFC2 !important; }

.profile-header { align-items: center; }
.avatar-large { border-color: var(--primary-color) !important; }
table { color: var(--text-color); }
th { color: var(--primary-color); background: var(--surface-muted) !important; }
th, td { border-bottom-color: var(--border-color) !important; }

/* Landing page: conserva su composición, pero usa la identidad institucional global. */
body:has(.hero) { background: var(--page-background); }
body:has(.hero) .brand,
body:has(.hero) .eyebrow,
body:has(.hero) .article-source,
body:has(.hero) .benefit-number { color: var(--primary-color); }
body:has(.hero) h1,
body:has(.hero) h2,
body:has(.hero) h3 { color: var(--primary-color); }
body:has(.hero) .button { border-radius: 6px; font-family: inherit; }
body:has(.hero) .button-primary,
body:has(.hero) .score { background: var(--primary-color) !important; border-color: var(--primary-color) !important; }
body:has(.hero) .button-primary:hover { background: var(--secondary-color) !important; }
body:has(.hero) .button-secondary { border-color: var(--secondary-color); }
body:has(.hero) .hero-art::before { border-color: var(--secondary-color); }
body:has(.hero) .study-sheet,
body:has(.hero) .article { background: var(--surface-color); }
body:has(.hero) .answer-correct,
body:has(.hero) .answer span,
body:has(.hero) .read { color: var(--success-color); }
body:has(.hero) .answer-correct span { border-color: var(--success-color); background: #E6F2EF; }
body:has(.hero) .benefits,
body:has(.hero) .article,
body:has(.hero) footer { border-color: var(--border-color); }
body:has(.hero) .benefit { background: var(--surface-muted); }
body:has(.hero) .section { border-top-color: var(--border-color); }

@media (max-width: 700px) {
  .site-nav { width: min(100% - 24px, 1100px); }
  .site-nav-inner { align-items: flex-start; flex-direction: column; }
  .site-links { gap: 10px 14px; font-size: .82rem; }
  .site-footer-inner, .cookie-banner { align-items: flex-start; flex-direction: column; }
  .container { width: min(100% - 24px, 1100px); margin: 12px auto; padding: 20px; }
  .header-nav { align-items: flex-start; flex-direction: column; }
  .profile-header { align-items: stretch; flex-direction: column; }
  .ranking-heading { align-items: flex-start; flex-direction: column; }
  .ranking-grid { grid-template-columns: 1fr; }
}