/* =============================================
   MEDLEX — Terminología Médica
   Paleta: azul clínico · teal · rojo vital
   ============================================= */

/* ---------- TOKENS ---------- */
:root {
  /* Clinical Navy (primary) */
  --navy-950: #040f1f;
  --navy-900: #0c1f3d;
  --navy-800: #0c4a6e;
  --navy-700: #075985;
  --navy-600: #0284c7;
  --navy-100: #e0f2fe;
  --navy-50:  #f0f9ff;

  /* Clinical Teal (secondary) */
  --teal-700: #0f766e;
  --teal-600: #0d9488;
  --teal-500: #14b8a6;
  --teal-400: #2dd4bf;
  --teal-100: #ccfbf1;
  --teal-50:  #f0fdfa;

  /* Vital Red (accent) */
  --red-700:  #b91c1c;
  --red-600:  #dc2626;
  --red-500:  #e63946;
  --red-100:  #fee2e2;
  --red-50:   #fef2f2;

  /* Clinical Green */
  --green-700: #047857;
  --green-600: #059669;
  --green-100: #d1fae5;
  --green-50:  #ecfdf5;

  /* Purple */
  --purple-700: #6d28d9;
  --purple-600: #7c3aed;
  --purple-100: #ede9fe;

  /* Sky (light accent) */
  --sky-400: #38bdf8;
  --sky-300: #7dd3fc;

  /* Neutrals */
  --gray-950: #030712;
  --gray-900: #111827;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50:  #f9fafb;
  --white:    #ffffff;

  --font-sans:  'Outfit', system-ui, sans-serif;
  --font-serif: 'Lora', Georgia, serif;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  --shadow-sm:   0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:   0 4px 16px rgba(0,0,0,.1);
  --shadow-lg:   0 10px 32px rgba(0,0,0,.13);
  --shadow-navy: 0 8px 32px rgba(12,74,110,.22);

  --ease: cubic-bezier(.4,0,.2,1);
  --t:    200ms;
  --ts:   420ms;
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
a { color: inherit; text-decoration: none; }
input { font-family: inherit; }

/* ---------- LAYOUT ---------- */
.container         { max-width: 1160px; margin-inline: auto; padding-inline: 24px; }
.container--narrow { max-width: 720px; }

/* ======================================
   HEADER
====================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--gray-200);
}
.header-inner {
  display: flex; align-items: center; gap: 20px;
  max-width: 1160px; margin-inline: auto;
  padding: 11px 24px;
}
.header-brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-logo svg { width: 40px; height: 40px; }
.header-titles { display: flex; flex-direction: column; line-height: 1.2; }
.header-subtitle {
  font-size: 10px; text-transform: uppercase; letter-spacing: .13em;
  color: var(--teal-600); font-weight: 600;
}
.header-title {
  font-size: 17px; font-weight: 800; color: var(--navy-800); letter-spacing: -.01em;
}
.header-nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-btn {
  padding: 7px 15px; border-radius: var(--radius-full);
  font-size: 14px; font-weight: 500; color: var(--gray-600);
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}
.nav-btn:hover { background: var(--gray-100); color: var(--navy-800); }
.nav-btn.active { background: var(--navy-800); color: var(--white); }
.nav-btn--quiz {
  background: var(--red-500) !important;
  color: var(--white) !important;
  font-weight: 700;
}
.nav-btn--quiz:hover { background: var(--red-700) !important; }
.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--navy-800); border-radius: 2px; transition: var(--t); }

/* ======================================
   SECTIONS VISIBILITY
====================================== */
.section         { display: none; }
.section--active { display: block; }

/* ======================================
   HERO
====================================== */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--navy-950) 0%, var(--navy-900) 55%, #0a3558 100%);
  min-height: 580px;
  display: grid; grid-template-columns: 1fr auto;
  align-items: center; gap: 40px;
  padding: 88px 60px;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(70px); opacity: .15;
}
.hero-orb--1 { width: 420px; height: 420px; background: var(--red-500);   top: -110px; right: -60px;  animation: float 9s ease-in-out infinite; }
.hero-orb--2 { width: 320px; height: 320px; background: var(--teal-500);  bottom: -90px; left: 8%;   animation: float 11s ease-in-out infinite reverse; }
.hero-orb--3 { width: 220px; height: 220px; background: var(--sky-400);   top: 45%; left: 52%;       animation: float 7s ease-in-out infinite 1.5s; }

.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
}

@keyframes float {
  0%,100% { transform: translateY(0)   scale(1); }
  50%      { transform: translateY(-22px) scale(1.06); }
}

.hero-content { position: relative; z-index: 1; max-width: 560px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius-full); padding: 6px 16px;
  font-size: 12px; color: rgba(255,255,255,.88); font-weight: 500;
  margin-bottom: 26px; letter-spacing: .04em;
}
.badge-dot {
  width: 8px; height: 8px;
  background: var(--teal-400); border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(.75)} }

.hero-heading {
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 800; color: var(--white); line-height: 1.14;
  margin-bottom: 22px;
}
.hero-heading em {
  font-style: normal; color: var(--teal-400);
  font-family: var(--font-serif);
}
.hero-text {
  font-size: 1.05rem; color: rgba(255,255,255,.76);
  margin-bottom: 34px; line-height: 1.75;
}
.hero-text strong { color: var(--sky-300); font-weight: 600; }

.hero-cta { display: flex; gap: 12px; margin-bottom: 42px; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px; border-radius: var(--radius-full);
  font-size: 15px; font-weight: 600; transition: all var(--t) var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--teal-600); color: var(--white);
}
.btn--primary:hover {
  background: var(--teal-700);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(13,148,136,.38);
}
.btn--ghost {
  background: rgba(255,255,255,.1); color: var(--white);
  border: 1.5px solid rgba(255,255,255,.28);
}
.btn--ghost:hover { background: rgba(255,255,255,.2); }
.btn--lg { padding: 14px 32px; font-size: 16px; }
.btn--next {
  background: var(--navy-800); color: var(--white);
  border-radius: var(--radius-full); padding: 12px 28px;
  font-size: 15px; font-weight: 600; margin-top: 8px;
  transition: background var(--t) var(--ease);
}
.btn--next:hover { background: var(--navy-700); }

/* Hero stats */
.hero-stats { display: flex; align-items: center; gap: 24px; }
.stat { display: flex; flex-direction: column; }
.stat strong { font-size: 1.6rem; color: var(--white); font-weight: 800; line-height: 1; }
.stat span   { font-size: 11px; color: rgba(255,255,255,.55); text-transform: uppercase; letter-spacing: .07em; margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,.18); }

/* Hero visual — spinning rings */
.hero-visual { position: relative; z-index: 1; width: 320px; height: 320px; flex-shrink: 0; }
.anatomical-rings { position: relative; width: 100%; height: 100%; }
.ring { position: absolute; border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.ring--outer { width: 310px; height: 310px; animation: spin 35s linear infinite; }
.ring--inner { width: 120px; height: 120px; animation: spin 18s linear infinite reverse; }
@keyframes spin { to { transform: translate(-50%,-50%) rotate(360deg); } }

.ring-label {
  position: absolute; top: 50%; left: 50%;
  transform-origin: 0 0;
  transform: rotate(var(--deg)) translateX(148px) translateY(-50%) rotate(calc(-1 * var(--deg)));
  font-size: 10.5px; font-weight: 700;
  color: var(--teal-400); letter-spacing: .07em;
  white-space: nowrap; opacity: .75;
}
.ring-center {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 50%;
}
.ring-center svg { width: 72px; height: 72px; }

/* ======================================
   DIDACTIC SECTION
====================================== */
.didactic { padding: 80px 0 88px; }
.section-title {
  font-size: 1.7rem; font-weight: 700; color: var(--navy-800);
  margin-bottom: 12px; text-align: center;
}
.section-lead {
  color: var(--gray-500); text-align: center;
  max-width: 600px; margin: 0 auto 52px;
  font-size: 1.05rem; line-height: 1.75;
}

/* Word anatomy demo */
.word-anatomy {
  background: linear-gradient(135deg, var(--navy-50), var(--teal-50));
  border: 1.5px solid var(--navy-100);
  border-radius: var(--radius-xl);
  padding: 44px 40px;
  margin-bottom: 48px;
  text-align: center;
}
.word-anatomy__word {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800; letter-spacing: .01em;
  margin-bottom: 22px;
  display: flex; justify-content: center; flex-wrap: wrap;
  gap: 2px;
}
.part { padding: 4px 14px; border-radius: var(--radius-sm); position: relative; cursor: default; }
.part--prefix { background: var(--navy-100); color: var(--navy-800); }
.part--root   { background: var(--teal-100); color: var(--teal-700); }
.part--suffix { background: var(--red-100);  color: var(--red-700); }
.part[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute; bottom: calc(100% + 8px); left: 50%;
  transform: translateX(-50%);
  background: var(--gray-900); color: white;
  font-size: 12px; font-weight: 400;
  padding: 6px 12px; border-radius: var(--radius-sm);
  white-space: nowrap; pointer-events: none; z-index: 10;
}
.word-anatomy__legend {
  display: flex; justify-content: center; gap: 20px;
  margin-bottom: 16px; flex-wrap: wrap;
}
.legend-item {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; color: var(--gray-600);
}
.legend-item::before { content:''; width: 12px; height: 12px; border-radius: 3px; }
.legend-item--prefix::before { background: var(--navy-100); }
.legend-item--root::before   { background: var(--teal-100); }
.legend-item--suffix::before { background: var(--red-100); }
.word-anatomy__meaning {
  font-family: var(--font-serif); font-size: 1.1rem;
  color: var(--navy-700); font-style: italic;
}

/* Concept cards */
.concept-cards {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 24px; margin-bottom: 60px;
}
.concept-card {
  background: var(--white); border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg); padding: 28px 24px;
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease), border-color var(--t) var(--ease);
}
.concept-card:hover {
  box-shadow: var(--shadow-md); transform: translateY(-4px);
  border-color: var(--navy-100);
}
.concept-card__icon {
  width: 46px; height: 46px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.concept-card__icon svg { width: 22px; height: 22px; }
.concept-card__icon--teal { background: var(--teal-50);  color: var(--teal-700); }
.concept-card__icon--blue { background: var(--navy-50);  color: var(--navy-800); }
.concept-card__icon--red  { background: var(--red-50);   color: var(--red-700); }
.concept-card h4 { font-size: 1rem; font-weight: 700; color: var(--navy-800); margin-bottom: 8px; }
.concept-card p  { font-size: .9rem; color: var(--gray-600); line-height: 1.65; }
.concept-card em { font-style: normal; font-weight: 600; color: var(--teal-700); }
.concept-card strong { color: var(--navy-800); }

/* Systems chips */
.systems-preview {}
.systems-title {
  font-size: 1rem; font-weight: 600; color: var(--gray-700);
  margin-bottom: 16px; text-align: center;
}
.systems-grid { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.system-chip {
  background: var(--gray-100); border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-full); padding: 8px 18px;
  font-size: 13px; font-weight: 500; color: var(--gray-700);
  cursor: pointer; transition: all var(--t) var(--ease);
}
.system-chip:hover {
  background: var(--teal-50); border-color: var(--teal-100);
  color: var(--teal-700);
}

/* ======================================
   TERM SECTIONS
====================================== */
.section-header { text-align: center; padding: 64px 0 40px; }
.section-header__tag {
  display: inline-block; padding: 4px 14px;
  border-radius: var(--radius-full); font-size: 12px;
  font-weight: 700; text-transform: uppercase; letter-spacing: .1em;
  margin-bottom: 12px;
}
.tag--blue   { background: var(--navy-100);   color: var(--navy-800); }
.tag--red    { background: var(--red-100);    color: var(--red-700); }
.tag--teal   { background: var(--teal-100);   color: var(--teal-700); }
.tag--purple { background: var(--purple-100); color: var(--purple-700); }

.section-heading {
  font-size: 2rem; font-weight: 800; color: var(--navy-800); margin-bottom: 12px;
}
.section-desc {
  color: var(--gray-500); font-size: 1rem;
  max-width: 520px; margin-inline: auto; line-height: 1.75;
}
.section-desc strong { color: var(--navy-700); }

/* Toolbar */
.toolbar {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 32px; flex-wrap: wrap;
}
.search-box {
  flex: 1; display: flex; align-items: center; gap: 10px;
  background: var(--gray-50); border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-full); padding: 10px 18px;
  min-width: 220px;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}
.search-box:focus-within {
  border-color: var(--teal-600); background: var(--white);
}
.search-box svg { width: 16px; height: 16px; color: var(--gray-400); flex-shrink: 0; }
.search-input {
  flex: 1; border: none; background: none; outline: none;
  font-size: 14px; color: var(--gray-800);
}
.search-input::placeholder { color: var(--gray-400); }
.filter-group { display: flex; gap: 6px; }
.filter-btn {
  padding: 8px 16px; border-radius: var(--radius-full);
  font-size: 13px; font-weight: 500; color: var(--gray-600);
  border: 1.5px solid var(--gray-200); background: var(--white);
  transition: all var(--t) var(--ease);
}
.filter-btn:hover { border-color: var(--teal-400); color: var(--teal-700); }
.filter-btn.active { background: var(--navy-800); color: var(--white); border-color: var(--navy-800); }

/* ======================================
   TERM CARDS
====================================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px; padding-bottom: 88px;
}

.term-card {
  background: var(--white); border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg); overflow: hidden;
  cursor: pointer; perspective: 1000px;
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease), border-color var(--t) var(--ease);
}
.term-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.term-card.flipped { border-color: var(--teal-400); }
.term-card.flipped .term-card__inner { transform: rotateY(180deg); }

.term-card__inner {
  position: relative; width: 100%;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
}
.term-card__front,
.term-card__back { padding: 24px; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.term-card__back {
  position: absolute; inset: 0; transform: rotateY(180deg);
  background: var(--navy-900); color: var(--white);
  border-radius: calc(var(--radius-lg) - 1.5px);
}

.term-card__header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 10px; }
.term-card__term {
  font-size: 1.45rem; font-weight: 800;
  color: var(--navy-800); font-family: var(--font-serif);
}
.term-card__origin {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; padding: 3px 10px; border-radius: var(--radius-full);
  flex-shrink: 0;
}
.origin--griego { background: var(--navy-100); color: var(--navy-800); }
.origin--latin  { background: var(--teal-100); color: var(--teal-700); }

.term-card__meaning {
  font-size: 1rem; color: var(--gray-700); font-weight: 500; margin-bottom: 12px;
}
.term-card__examples { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.example-chip {
  background: var(--gray-100); border-radius: var(--radius-sm);
  padding: 3px 10px; font-size: 12px; color: var(--gray-700); font-weight: 500;
}
.term-card__hint { font-size: 11px; color: var(--gray-400); }
.term-card__system { display: block; font-size: 11px; color: var(--gray-400); margin-top: 8px; }

/* Back face */
.term-card__back-term {
  font-size: 1.6rem; font-weight: 800; font-family: var(--font-serif);
  color: var(--teal-400); margin-bottom: 6px;
}
.term-card__back-meaning { font-size: 1rem; color: rgba(255,255,255,.88); margin-bottom: 14px; line-height: 1.5; }
.term-card__back-origin  { font-size: 12px; color: rgba(255,255,255,.45); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 14px; }
.term-card__back-examples { display: flex; flex-wrap: wrap; gap: 8px; }
.term-card__back-examples .example-chip { background: rgba(255,255,255,.12); color: rgba(255,255,255,.82); }

/* Per-system accent color on the term text */
.term-card[data-system="cardiovascular"] .term-card__term { color: var(--red-600); }
.term-card[data-system="nervioso"]       .term-card__term { color: var(--purple-600); }
.term-card[data-system="digestivo"]      .term-card__term { color: #b45309; }
.term-card[data-system="respiratorio"]   .term-card__term { color: var(--teal-700); }
.term-card[data-system="urinario"]       .term-card__term { color: var(--navy-600); }
.term-card[data-system="oncologia"]      .term-card__term { color: var(--red-700); }

/* Empty state */
.empty-state {
  grid-column: 1 / -1; text-align: center;
  padding: 80px 20px; color: var(--gray-400);
}
.empty-state svg { width: 64px; height: 64px; margin: 0 auto 16px; }
.empty-state p { font-size: 1rem; }
.hidden { display: none !important; }

/* ======================================
   QUIZ
====================================== */
.quiz-card {
  background: var(--white); border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-xl); padding: 48px 40px;
  text-align: center; box-shadow: var(--shadow-sm); margin-bottom: 40px;
}
.quiz-start__icon { font-size: 4rem; margin-bottom: 20px; }
.quiz-start h3 { font-size: 1.6rem; font-weight: 700; color: var(--navy-800); margin-bottom: 12px; }
.quiz-start p  { color: var(--gray-500); font-size: 1rem; max-width: 400px; margin: 0 auto 24px; line-height: 1.75; }
.quiz-start__meta {
  display: flex; justify-content: center; gap: 16px;
  margin-bottom: 32px; flex-wrap: wrap;
}
.quiz-start__meta span {
  font-size: 14px; color: var(--gray-600);
  background: var(--gray-50); border: 1px solid var(--gray-200);
  padding: 8px 16px; border-radius: var(--radius-full);
}

/* Progress bar */
.quiz-progress { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; text-align: left; }
.quiz-progress__bar {
  flex: 1; height: 6px; background: var(--gray-200);
  border-radius: var(--radius-full); overflow: hidden;
}
.quiz-progress__fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--teal-600), var(--teal-400));
  border-radius: var(--radius-full);
  transition: width var(--ts) var(--ease);
}
.quiz-progress__label { font-size: 13px; font-weight: 600; color: var(--gray-600); white-space: nowrap; }
.quiz-score-live { font-size: 13px; color: var(--gray-500); margin-bottom: 10px; text-align: right; }
.quiz-score-live strong { color: var(--navy-800); font-size: 16px; }
.quiz-q-type {
  font-size: 12px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; margin-bottom: 18px; text-align: left;
}
.quiz-question__text {
  font-size: 1.3rem; font-weight: 700; color: var(--navy-800);
  margin-bottom: 28px; text-align: left; line-height: 1.45;
}

/* Options */
.quiz-options { display: flex; flex-direction: column; gap: 11px; margin-bottom: 22px; }
.quiz-option {
  display: flex; align-items: center; gap: 14px;
  padding: 15px 20px; border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-md); background: var(--white);
  font-size: 15px; font-weight: 500; color: var(--gray-800);
  text-align: left; transition: all var(--t) var(--ease); cursor: pointer;
}
.quiz-option:hover:not(:disabled) {
  border-color: var(--teal-500); background: var(--teal-50); color: var(--teal-700);
}
.quiz-option__letter {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--gray-100); display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; flex-shrink: 0;
  transition: all var(--t) var(--ease);
}
.quiz-option.correct { border-color: var(--green-600); background: var(--green-50); color: var(--green-700); }
.quiz-option.correct .quiz-option__letter { background: var(--green-600); color: white; }
.quiz-option.incorrect { border-color: var(--red-600); background: var(--red-50); color: var(--red-700); }
.quiz-option.incorrect .quiz-option__letter { background: var(--red-600); color: white; }
.quiz-option:disabled { cursor: default; }

/* Results */
.results-score-ring { position: relative; width: 140px; height: 140px; margin: 0 auto 20px; }
.results-score-ring svg { width: 100%; height: 100%; }
.results-score-ring__label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.results-score-ring__label strong { font-size: 2.2rem; font-weight: 800; color: var(--navy-800); line-height: 1; }
.results-score-ring__label span   { font-size: 13px; color: var(--gray-500); }
.results-emoji   { font-size: 2.5rem; margin-bottom: 12px; }
.results-title   { font-size: 1.5rem; font-weight: 700; color: var(--navy-800); margin-bottom: 8px; }
.results-message { color: var(--gray-500); margin-bottom: 28px; font-size: 1rem; max-width: 400px; margin-inline: auto; }
.results-breakdown { display: flex; justify-content: center; gap: 20px; margin-bottom: 28px; flex-wrap: wrap; }
.breakdown-item { text-align: center; padding: 12px 22px; border-radius: var(--radius-md); }
.breakdown-item.correct   { background: var(--green-50); }
.breakdown-item.incorrect { background: var(--red-50); }
.breakdown-item strong { display: block; font-size: 1.6rem; font-weight: 800; }
.breakdown-item.correct   strong { color: var(--green-600); }
.breakdown-item.incorrect strong { color: var(--red-600); }
.breakdown-item span { font-size: 12px; color: var(--gray-500); }
.results-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.results-actions .btn--ghost {
  background: var(--gray-100); color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
}
.results-actions .btn--ghost:hover { background: var(--gray-200); transform: none; box-shadow: none; }

/* ======================================
   FOOTER
====================================== */
.site-footer {
  background: var(--navy-950); color: rgba(255,255,255,.6);
  padding: 44px 0; border-top: 1px solid rgba(255,255,255,.05);
}
.footer-inner {
  display: grid; grid-template-columns: auto 1fr;
  align-items: start; gap: 32px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand div { display: flex; flex-direction: column; gap: 3px; }
.footer-brand strong { color: var(--white); font-size: 15px; font-weight: 700; }
.footer-brand span   { font-size: 12px; color: rgba(255,255,255,.4); }
.footer-meta { font-size: 12px; line-height: 1.9; }

/* ======================================
   RESPONSIVE
====================================== */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 64px 24px; }
  .hero-visual { display: none; }
  .concept-cards { grid-template-columns: 1fr; gap: 16px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { justify-content: center; text-align: center; }
  .footer-meta  { text-align: center; }
}
@media (max-width: 640px) {
  .header-nav { display: none; }
  .header-nav.open {
    display: flex; flex-direction: column;
    position: fixed; inset: 65px 0 0 0;
    background: var(--white); padding: 20px 24px;
    z-index: 99; border-top: 1px solid var(--gray-200);
    gap: 6px;
  }
  .header-nav.open .nav-btn { text-align: left; border-radius: var(--radius-md); padding: 12px 16px; }
  .menu-toggle { display: flex; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .quiz-card { padding: 28px 20px; }
  .hero { padding: 52px 20px; }
  .hero-stats { gap: 16px; }
  .word-anatomy { padding: 28px 20px; }
}

/* ======================================
   ANIMATIONS
====================================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.cards-grid .term-card { animation: fadeUp .28s ease both; }
.cards-grid .term-card:nth-child(1)   { animation-delay: .02s }
.cards-grid .term-card:nth-child(2)   { animation-delay: .05s }
.cards-grid .term-card:nth-child(3)   { animation-delay: .08s }
.cards-grid .term-card:nth-child(4)   { animation-delay: .11s }
.cards-grid .term-card:nth-child(5)   { animation-delay: .14s }
.cards-grid .term-card:nth-child(6)   { animation-delay: .17s }
.cards-grid .term-card:nth-child(7)   { animation-delay: .20s }
.cards-grid .term-card:nth-child(8)   { animation-delay: .23s }
.cards-grid .term-card:nth-child(n+9) { animation-delay: .26s }