/* ============================================================
   FNP Prep — Unified Stylesheet
   Place at: /med-study-guide/styles.css
   Fonts are loaded per-page via <link> in <head>
   ============================================================ */

/* -------- RESET -------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* -------- DESIGN TOKENS -------- */
:root {
  --lavender:   #D7D9FB;
  --cream:      #F3F5E7;
  --forest:     #143D0D;
  --orange:     #F25032;
  --purple:     #734E93;
  --mid-green:  #92B079;
  --white:      #FFFFFF;

  --card-bg:    rgba(255,255,255,0.75);
  --nav-bg:     rgba(255,255,255,0.92);

  --text:       #2A2A2A;
  --text-muted: #5A6A52;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 20px rgba(20,61,13,0.07);

  --font-display: 'Barrio', fantasy;
  --font-label:   'Aboreto', sans-serif;
  --font-body:    'Nunito', sans-serif;
}

/* -------- BASE -------- */
body {
  font-family: var(--font-body);
  background: linear-gradient(135deg, var(--lavender) 0%, var(--cream) 100%);
  min-height: 100vh;
  color: var(--text);
}

/* -------- TOP NAV (subject tabs) -------- */
.top-nav {
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid rgba(242,80,50,0.12);
  position: sticky;
  top: 0;
  z-index: 100;
}
.top-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  min-height: 56px;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-brand,
.top-nav .brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--orange);
  text-decoration: none;
  margin-right: 2rem;
}

/* Subject tabs (Anatomy / Physiology / etc.) */
.subject-tabs {
  display: flex;
  align-items: stretch;
  list-style: none;
}
.subject-tabs li a {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--forest);
  text-decoration: none;
  padding: 0 1rem;
  height: 56px;
  display: flex;
  align-items: center;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
  text-transform: uppercase;
}
.subject-tabs li a:hover,
.subject-tabs li a.active {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* Pill-style nav items (used on root index) */
.top-nav a.nav-item {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--forest);
  text-decoration: none;
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  transition: background 0.2s;
}
.top-nav a.nav-item:hover { background: rgba(242,80,50,0.1); }
.top-nav a.nav-item.active { background: var(--orange); color: #fff; }

/* -------- SUB NAV (organ pills) -------- */
.sub-nav {
  background: rgba(215,217,251,0.35);
  border-bottom: 1px solid rgba(20,61,13,0.07);
  padding: 0 2rem;
}
.sub-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  min-height: 40px;
  gap: 0.15rem;
  flex-wrap: wrap;
}
.sub-nav a {
  font-family: var(--font-label);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  color: var(--forest);
  text-decoration: none;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  transition: all 0.2s;
  opacity: 0.7;
}
.sub-nav a:hover,
.sub-nav a.active-sub {
  background: rgba(242,80,50,0.1);
  color: var(--orange);
  opacity: 1;
}

/* -------- PAGE HERO -------- */
.page-hero {
  background: linear-gradient(120deg, rgba(215,217,251,0.8) 0%, rgba(243,245,231,0.8) 100%);
  border-bottom: 1px solid rgba(20,61,13,0.1);
  padding: 2rem 2rem 1.8rem;
}
.page-hero-inner { max-width: 1200px; margin: 0 auto; }
.page-tag {
  font-family: var(--font-label);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--forest);
  text-transform: uppercase;
  opacity: 0.6;
  margin-bottom: 0.4rem;
}
.page-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 4rem);
  color: var(--orange);
  text-shadow: 3px 3px 0 rgba(115,78,147,0.3);
  line-height: 1;
  margin-bottom: 0.4rem;
}
.page-subtitle {
  font-family: var(--font-label);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--forest);
  opacity: 0.65;
}

/* Simpler hero (used on root index.html) */
.hero { text-align: center; padding: 3rem 1rem 1.5rem; }
.hero .tag {
  font-family: var(--font-label);
  font-size: 0.8rem;
  letter-spacing: 3px;
  color: var(--forest);
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  color: var(--orange);
  text-shadow: 3px 3px 0 rgba(115,78,147,0.35);
  margin-top: 0.3rem;
}
.hero p { max-width: 640px; margin: 0.8rem auto 0; font-size: 1.05rem; color: #555; }

/* -------- LAYOUT WITH TOC -------- */
.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 2rem;
}
.toc {
  position: sticky;
  top: 98px;
  align-self: start;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: 0 4px 16px rgba(20,61,13,0.07);
}
.toc-title {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--forest);
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  opacity: 0.7;
}
.toc a {
  display: block;
  font-size: 0.76rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.2rem;
  transition: all 0.2s;
  border-left: 2px solid transparent;
}
.toc a:hover {
  background: rgba(242,80,50,0.08);
  color: var(--orange);
  border-left-color: var(--orange);
}

/* Plain-main wrapper (root index) */
.main { max-width: 1200px; margin: 0 auto; padding: 1.5rem 1.5rem 3rem; }

/* -------- CONTENT CARDS -------- */
.content { display: flex; flex-direction: column; gap: 1.5rem; }

.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  border: 1.5px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-card);
}
.card-header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1.5px solid rgba(20,61,13,0.08);
}
.card-header-icon { font-size: 1.4rem; }
.card-header h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--orange);
}
.card p, .card li {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.card ul, .card ol { padding-left: 1.4rem; margin-bottom: 0.8rem; }
.card h3 {
  font-family: var(--font-label);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--forest);
  text-transform: uppercase;
  margin: 1rem 0 0.5rem;
  opacity: 0.8;
}
.card strong { color: var(--forest); }

/* -------- INFO BOXES -------- */
.box {
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin: 0.8rem 0;
  font-size: 0.84rem;
  line-height: 1.7;
}
.box-label {
  font-family: var(--font-label);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 0.3rem;
}
.box-clinical  { background: rgba(210,228,199,0.5); border-left: 3px solid #6BA057; }
.box-pearl     { background: rgba(255,240,180,0.5); border-left: 3px solid #E8B400; }
.box-mnemonic  { background: rgba(210,190,230,0.4); border-left: 3px solid var(--purple); }
.box-clinical  .box-label { color: #3D6B2A; }
.box-pearl     .box-label { color: #8A6A00; }
.box-mnemonic  .box-label { color: var(--purple); }

/* -------- TABLES -------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin: 0.8rem 0;
}
th {
  background: var(--forest);
  color: var(--white);
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.6rem 0.8rem;
  text-align: left;
}
td { padding: 0.55rem 0.8rem; border-bottom: 1px solid rgba(20,61,13,0.08); }
tr:nth-child(even) td { background: rgba(210,228,199,0.25); }

/* -------- SECTION HEADS (root index) -------- */
.section-head { margin: 2rem 0 1rem; }
.section-head .label {
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 2.5px;
  color: var(--forest);
  text-transform: uppercase;
}
.section-head .title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--orange);
  margin-top: 0.2rem;
}
.section-head .sub { font-size: 0.9rem; color: #666; margin-top: 0.2rem; }
.section-head .divider {
  width: 50px; height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--purple));
  border-radius: 2px;
  margin-top: 0.6rem;
}

/* -------- SYSTEMS GRID (root index) -------- */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.system-card {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(114,78,147,0.18);
  border-radius: var(--radius-md);
  padding: 1.1rem 1rem;
  transition: transform 0.15s, box-shadow 0.15s;
}
.system-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(115,78,147,0.12);
}
.system-card .system-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--forest);
  margin-bottom: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.system-card .system-name .icon { font-size: 1.1rem; }

/* -------- SPECIAL TOPICS (root index) -------- */
.special-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}
.special-card {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(114,78,147,0.18);
  border-radius: var(--radius-md);
  padding: 1.2rem;
}
.special-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--orange);
  margin-bottom: 0.4rem;
}
.special-card p {
  font-size: 0.85rem;
  color: #555;
  margin-bottom: 0.8rem;
  line-height: 1.5;
}

/* -------- PILL ROW (used on root index cards) -------- */
.pill-row { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.pill {
  font-family: var(--font-body);
  font-size: 0.74rem;
  font-weight: 700;
  text-decoration: none;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  border: 1.5px solid;
  transition: all 0.18s;
  white-space: nowrap;
}
.pill.anatomy      { color: var(--purple); border-color: var(--purple); background: rgba(115,78,147,0.06); }
.pill.anatomy:hover{ background: var(--purple); color: #fff; }
.pill.physiology   { color: #0e7490; border-color: #0ea5e9; background: rgba(14,165,233,0.06); }
.pill.physiology:hover{ background: #0ea5e9; color: #fff; }
.pill.pathophys    { color: #be123c; border-color: #f43f5e; background: rgba(244,63,94,0.06); }
.pill.pathophys:hover{ background: #f43f5e; color: #fff; }
.pill.pharmacology { color: #b45309; border-color: var(--orange); background: rgba(242,80,50,0.06); }
.pill.pharmacology:hover{ background: var(--orange); color: #fff; }
.pill.cases        { color: var(--forest); border-color: var(--forest); background: rgba(20,61,13,0.06); }
.pill.cases:hover  { background: var(--forest); color: #fff; }
.pill.peds         { color: var(--purple); border-color: var(--purple); background: rgba(115,78,147,0.06); }
.pill.peds:hover   { background: var(--purple); color: #fff; }

/* -------- FOOTER -------- */
footer {
  text-align: center;
  padding: 2rem;
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--forest);
  opacity: 0.55;
  border-top: 1px solid rgba(20,61,13,0.1);
}
footer a { color: var(--orange); text-decoration: none; font-weight: 700; }
footer a:hover { text-decoration: underline; }

/* -------- SCROLLBAR -------- */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb { background: var(--mid-green); border-radius: 4px; }

/* -------- RESPONSIVE -------- */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .toc { display: none; }
}
@media (max-width: 640px) {
  .hero { padding: 2rem 1rem 1rem; }
  .top-nav-inner { padding: 0 0.8rem; }
  .top-nav .brand, .site-brand { font-size: 1.2rem; }
}

/* ============================================================
   LEGACY COMPAT — supports older inline-style markup so pages
   can switch to <link rel="stylesheet" href="../styles.css">
   without changing their HTML structure. Safe to remove later
   once all pages have been migrated to the canonical markup.
   ============================================================ */

/* Top nav: support pages without a .top-nav-inner wrapper */
.top-nav:not(:has(.top-nav-inner)) {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.6rem 1.5rem;
  min-height: 56px;
}

/* Top nav: bare <a> children (no .nav-item class) get pill styling */
.top-nav > a:not(.brand):not(.site-brand):not(.nav-item) {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--forest);
  text-decoration: none;
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  transition: background 0.2s;
}
.top-nav > a:not(.brand):not(.site-brand):not(.nav-item):hover {
  background: rgba(242,80,50,0.1);
}
.top-nav > a.active:not(.brand):not(.site-brand):not(.nav-item) {
  background: var(--orange);
  color: #fff;
}

/* Sub nav: support pages without a .sub-nav-inner wrapper */
.sub-nav:not(:has(.sub-nav-inner)) {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.15rem;
  padding: 0.5rem 1.5rem;
}

/* TOC: support legacy <h3>Contents</h3> instead of .toc-title */
.toc h3 {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--forest);
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  opacity: 0.7;
  font-weight: normal;
}

/* Content sections: apply card styling to bare <section> children */
.content > section {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  border: 1.5px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-card);
}
.content > section > h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--orange);
  margin-bottom: 1.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1.5px solid rgba(20,61,13,0.08);
}
.content > section > h3 {
  font-family: var(--font-label);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--forest);
  text-transform: uppercase;
  margin: 1rem 0 0.5rem;
  opacity: 0.8;
}
.content > section p,
.content > section li {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.content > section ul,
.content > section ol {
  padding-left: 1.4rem;
  margin-bottom: 0.8rem;
}

/* Boxes: support legacy <strong> as the label inside .box-* */
.box-clinical,
.box-pearl,
.box-mnemonic {
  border-radius: 12px;
  padding: 0.9rem 1.1rem;
  margin: 0.8rem 0;
  font-size: 0.86rem;
  line-height: 1.7;
}
.box-clinical > strong:first-child,
.box-pearl > strong:first-child,
.box-mnemonic > strong:first-child {
  display: block;
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  opacity: 0.9;
  font-weight: 700;
}

/* === added for anatomy/{gu,neuro,skin}.html: tab nav + grid body === */
.nav-tabs { display: flex; gap: 0.25rem; flex-wrap: wrap; }
.nav-tabs a { font-family: 'Aboreto', sans-serif; font-size: 0.7rem; letter-spacing: 0.08em; color: #143D0D; padding: 0.9rem 0.9rem; border-bottom: 3px solid transparent; transition: all 0.2s; white-space: nowrap; }
.nav-tabs a:hover { color: #F25032; border-bottom-color: #F25032; }
.nav-tabs a.active { color: #F25032; border-bottom-color: #F25032; font-weight: 700; }
.page-body { display: grid; grid-template-columns: 220px 1fr; gap: 2rem; max-width: 1100px; margin: 2rem auto; padding: 0 2rem 4rem; }
@media (max-width: 700px) { .page-body { grid-template-columns: 1fr; } }
/* === added for anatomy/psychiatry.html === */
.brand .leaf { color: var(--green); margin-right: 4px; }
.disorder-card { border: 1px solid rgba(20,61,13,.12); border-radius: 14px; padding: 20px 24px; margin: 18px 0; background: #fff; }
.disorder-card > h3:first-child { margin-top: 0; }

/* === added for root-level body-system pages: top nav with .nav-* classes === */
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; flex-wrap: wrap; min-height: 58px; gap: 0.5rem; }
.nav-brand { font-family: 'Barrio', fantasy; font-size: 1.4rem; color: var(--orange); text-decoration: none; margin-right: 1rem; }
.nav-links { display: flex; flex-wrap: wrap; gap: 0.15rem; align-items: center; list-style: none; }
.nav-links a { font-family: 'Aboreto', sans-serif; font-size: 0.62rem; letter-spacing: 0.08em; color: var(--forest); text-decoration: none; padding: 0.35rem 0.65rem; border-radius: 20px; transition: all 0.2s; }
.nav-links a:hover, .nav-links a.active { background: var(--orange); color: var(--white); }
