/* ==========================================================================
   Mr. Marks' HTML Study Guide — Stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700;9..144,900&family=IBM+Plex+Mono:wght@400;500;600;700&display=swap');

:root {
  --color-black: #000000;
  --color-tan: #86745c;
  --color-light-tan: #c2baab;
  --color-dark-tan: #6a5c48;
  --color-white: #ffffff;
  --color-black-63: rgba(0, 0, 0, 0.63);
  --color-black-80: rgba(0, 0, 0, 0.8);
  --color-black-88: rgba(0, 0, 0, 0.88);
  --color-gold: #b19977;
  --color-accent: #b19977;
  --color-accent-light: #c2baab;

  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --radius-tag: 6px;
  --radius-card: 14px;
  --border-hair: 1px solid rgba(0, 0, 0, 0.12);
  --shadow-card: 0 1px 0 rgba(0, 0, 0, 0.04);
  --max-width: 920px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-black-88);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-dark-tan);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
.term-card:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-black);
  margin: 0;
  line-height: 1.15;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- Header ---------------- */

.site-header {
  border-bottom: var(--border-hair);
  background: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-top: 16px;
  padding-bottom: 16px;
  flex-wrap: wrap;
}

.mascot-badge {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--color-tan);
  flex-shrink: 0;
  background: var(--color-light-tan);
}

.mascot-badge img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-right: auto;
  text-decoration: none;
}

.brand-text h1 {
  font-size: 1.35rem;
}

.brand-text p {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--color-tan);
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 6px;
  background: #f5f2ec;
  border: var(--border-hair);
  border-radius: 999px;
  padding: 4px;
}

.site-nav a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-black-63);
  padding: 8px 18px;
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav a:hover {
  color: var(--color-black);
}

.site-nav a[aria-current="page"] {
  background: var(--color-black);
  color: var(--color-white);
}

/* ---------------- Hero ---------------- */

.hero {
  border-bottom: var(--border-hair);
  background: linear-gradient(180deg, #faf8f4 0%, #ffffff 100%);
}

.hero .wrap {
  padding-top: 48px;
  padding-bottom: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 32px;
  align-items: center;
}

.hero-portrait {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-tan);
  background: var(--color-light-tan);
  flex-shrink: 0;
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-copy .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-tan);
  margin: 0 0 8px;
}

.hero-copy h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  max-width: 16ch;
}

.hero-copy p {
  max-width: 62ch;
  color: var(--color-black-80);
  margin-top: 14px;
}

.hero-stats {
  display: flex;
  gap: 28px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.hero-stats div {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-black);
}

.hero-stats span {
  font-size: 0.75rem;
  color: var(--color-tan);
}

@media (max-width: 640px) {
  .hero .wrap {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero-portrait {
    width: 96px;
    height: 96px;
  }
}

/* ---------------- Main sections ---------------- */

main {
  padding: 40px 0 80px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.section-heading h2 {
  font-size: 1.5rem;
}

.section-heading p {
  margin: 0;
  color: var(--color-tan);
  font-size: 0.85rem;
}

/* ---------------- Search / filter ---------------- */

.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-bar input[type="search"] {
  flex: 1;
  min-width: 220px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 12px 16px;
  border: 1.5px solid var(--color-light-tan);
  border-radius: var(--radius-tag);
  background: var(--color-white);
  color: var(--color-black-88);
}

.filter-bar input[type="search"]::placeholder {
  color: var(--color-tan);
}

.result-count {
  align-self: center;
  font-size: 0.8rem;
  color: var(--color-tan);
  white-space: nowrap;
}

/* ---------------- Term cards (flip) ---------------- */

.term-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
}

.term-card {
  all: unset;
  cursor: pointer;
  border: 1.5px solid var(--color-light-tan);
  border-radius: var(--radius-card);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
  min-height: 132px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px;
  position: relative;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.term-card:hover {
  border-color: var(--color-tan);
}

.term-card:active {
  transform: scale(0.99);
}

.term-card .tag-term {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--color-black);
  word-break: break-word;
}

.term-card .flip-hint {
  font-size: 0.68rem;
  color: var(--color-tan);
  letter-spacing: 0.02em;
}

.term-card .tag-def {
  display: none;
  font-size: 0.86rem;
  color: var(--color-black-80);
  line-height: 1.5;
  margin-top: 10px;
}

.term-card[aria-pressed="true"] {
  background: var(--color-black);
  border-color: var(--color-black);
}

.term-card[aria-pressed="true"] .tag-term {
  color: var(--color-accent-light);
  font-size: 0.78rem;
}

.term-card[aria-pressed="true"] .flip-hint {
  color: rgba(255, 255, 255, 0.45);
}

.term-card[aria-pressed="true"] .tag-def {
  display: block;
  color: var(--color-white);
}

.no-results {
  padding: 40px 0;
  text-align: center;
  color: var(--color-tan);
  font-size: 0.95rem;
}

.no-results[hidden] {
  display: none;
}

/* ---------------- Buttons ---------------- */

.btn {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-tag);
  padding: 13px 26px;
  border: 1.5px solid var(--color-black);
  background: var(--color-black);
  color: var(--color-white);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background: var(--color-dark-tan);
  border-color: var(--color-dark-tan);
}

.btn.btn-ghost {
  background: transparent;
  color: var(--color-black);
  border-color: var(--color-light-tan);
}

.btn.btn-ghost:hover {
  background: #f5f2ec;
  border-color: var(--color-tan);
  color: var(--color-black);
}

.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ---------------- Practice test: setup ---------------- */

.card-panel {
  border: 1.5px solid var(--color-light-tan);
  border-radius: var(--radius-card);
  background: var(--color-white);
  padding: 32px;
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 24px 0 28px;
}

.setup-field label {
  display: block;
  font-size: 0.78rem;
  color: var(--color-tan);
  margin-bottom: 8px;
}

.setup-field select {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1.5px solid var(--color-light-tan);
  border-radius: var(--radius-tag);
  background: var(--color-white);
  color: var(--color-black-88);
}

/* ---------------- Quiz question ---------------- */

.quiz-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  font-size: 0.8rem;
  color: var(--color-tan);
}

.progress-track {
  flex: 1;
  height: 6px;
  background: #f0ece3;
  border-radius: 999px;
  margin: 0 16px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-gold);
  border-radius: 999px;
  transition: width 0.25s ease;
}

.question-kicker {
  font-size: 0.75rem;
  color: var(--color-tan);
  margin-bottom: 10px;
}

.question-prompt {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-black);
  margin-bottom: 24px;
  line-height: 1.4;
}

.question-prompt code, .prompt-tag {
  font-family: var(--font-mono);
  background: #f5f2ec;
  border: var(--border-hair);
  border-radius: 6px;
  padding: 2px 8px;
  color: var(--color-dark-tan);
}

.choice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.choice {
  all: unset;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1.5px solid var(--color-light-tan);
  border-radius: var(--radius-tag);
  font-size: 0.92rem;
  color: var(--color-black-88);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.choice:hover:not([disabled]) {
  border-color: var(--color-tan);
  background: #faf8f4;
}

.choice .choice-letter {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-tan);
  flex-shrink: 0;
}

.choice[disabled] {
  cursor: default;
}

.choice.is-correct {
  border-color: #4d7a52;
  background: #eef5ef;
}

.choice.is-correct .choice-letter {
  color: #4d7a52;
}

.choice.is-wrong {
  border-color: #a5453d;
  background: #faeeec;
}

.choice.is-wrong .choice-letter {
  color: #a5453d;
}

.feedback-line {
  margin-top: 18px;
  font-size: 0.85rem;
  min-height: 1.4em;
}

.feedback-line.correct {
  color: #3f6644;
}

.feedback-line.wrong {
  color: #8a3a32;
}

.quiz-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 26px;
}

/* ---------------- Results ---------------- */

.result-hero {
  text-align: center;
  padding: 12px 0 8px;
}

.result-score {
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--color-black);
  line-height: 1;
}

.result-score span {
  font-size: 1.7rem;
  color: var(--color-tan);
}

.result-label {
  margin-top: 10px;
  font-size: 0.95rem;
  color: var(--color-black-80);
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 28px 0 8px;
  flex-wrap: wrap;
}

.review-list {
  margin-top: 32px;
  border-top: var(--border-hair);
  padding-top: 24px;
}

.review-item {
  padding: 16px 0;
  border-bottom: var(--border-hair);
}

.review-item:last-child {
  border-bottom: none;
}

.review-item .review-q {
  font-size: 0.78rem;
  color: var(--color-tan);
  margin-bottom: 6px;
}

.review-item .review-your {
  color: #8a3a32;
  font-size: 0.88rem;
}

.review-item .review-correct {
  color: #3f6644;
  font-size: 0.88rem;
  margin-top: 4px;
}

/* ---------------- Footer ---------------- */

.site-footer {
  border-top: var(--border-hair);
  background: #faf8f4;
}

.site-footer .wrap {
  padding: 28px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--color-tan);
}

.site-footer .footer-note {
  font-weight: 600;
  color: var(--color-dark-tan);
}