@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ================================
   COLOR PALETTE & VARIABLES
================================ */
:root {
  --orange:       #D4882A;  /* slightly more muted orange */
  --orange-light: #E09A45;
  --orange-pale:  #F0DFC0;
  --orange-tint:  #F5EDE0;
  --orange-dark:  #B8762A;
  --orange-deeper:#9A6022;
  --navy:         #111111;  /* repurposed as near-black */
  --navy-dark:    #000000;
  --sky:          #7B96B9;
  --grey:         #888888;
  --bg:           #F4F1EB;  /* warm cream */
  --bg-card:      #F9F7F2;
  --border:       #DDD7CD;  /* subtle warm gray */
  --border-dark:  rgba(0,0,0,0.08);
  --text:         #111111;
  --text-muted:   #888888;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'kern' 1;
}

a { text-decoration: none; }

/* ================================
   NAVBAR
================================ */
.navbar {
  display: flex;
  align-items: center;
  background: var(--bg);
  padding: 0 2.5rem;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.nav-left  { flex: 1; }
.nav-center { display: flex; gap: 2.5rem; }
.nav-right  { flex: 1; }

.navbar-logo {
  display: inline-block;
  color: var(--text);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: opacity 0.2s;
}
.navbar-logo:hover { opacity: 0.45; }

.nav-center a {
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav-center a:hover,
.nav-center a.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

/* ================================
   LOGIN PAGE
================================ */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: var(--bg);
}

.login-card {
  background: var(--bg-card);
  border-radius: 4px;
  padding: 3rem 3.25rem 3.25rem;
  width: 400px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 32px rgba(30,42,54,0.08);
  text-align: center;
}

.login-lock-icon {
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: center;
  color: var(--orange);
}

.login-card h1 {
  font-size: 1.9rem;
  color: var(--text);
  margin-bottom: 0.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.login-card .subtitle {
  font-size: 0.875rem;
  color: var(--grey);
  margin-bottom: 2rem;
}

.form-group { margin-bottom: 1.25rem; text-align: left; }
.form-group label {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.form-group input {
  width: 100%;
  padding: 0.72rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.95rem;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color 0.2s;
}
.form-group input:focus { border-color: var(--orange); }

.btn-submit {
  width: 100%;
  padding: 0.82rem;
  background: var(--text);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: opacity 0.2s;
}
.btn-submit:hover { opacity: 0.75; }

.error-msg {
  color: #9F3A2A;
  font-size: 0.85rem;
  margin-top: 1rem;
  padding: 0.65rem 0.9rem;
  background: #FAEAE7;
  border-radius: 4px;
  border-left: 3px solid #C0392B;
  text-align: left;
  display: none;
}

/* ================================
   HOME PAGE
================================ */
.home-content {
  display: flex;
  height: calc(100vh - 58px);
}

.home-left {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 5rem;
  border-right: 1px solid var(--border);
}

.home-left-inner { max-width: 420px; }

.home-eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 1.25rem;
}

.home-left p {
  font-size: 2.5rem;
  color: var(--text);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.home-left p em {
  color: var(--orange);
  font-style: normal;
}

.home-left .home-sub {
  font-size: 0.95rem;
  color: var(--grey);
  margin-top: 1.25rem;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0;
}

.home-right {
  flex: 1;
  background: #D8D3C8;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.home-right .placeholder-label {
  color: rgba(0,0,0,0.28);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.home-right .placeholder-icon {
  color: rgba(0,0,0,0.14);
}

/* ================================
   QUESTION BANK
================================ */
.qb-page {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 58px);
}

/* Filter Bar */
.qb-filterbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  flex-wrap: wrap;
}

.qb-filterbar label {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.qb-filterbar .filter-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.qb-select {
  appearance: none;
  -webkit-appearance: none;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2333475E' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 0.7rem center;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.42rem 2.1rem 0.42rem 0.8rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  min-width: 145px;
  transition: border-color 0.2s;
}
.qb-select:focus { outline: none; border-color: var(--orange); }

.btn-reset-filters {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.4rem 0.85rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--grey);
  cursor: pointer;
  text-transform: uppercase;
  transition: border-color 0.2s, color 0.2s;
}
.btn-reset-filters:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.qb-count {
  font-size: 0.8rem;
  color: var(--grey);
  letter-spacing: 0.01em;
}

/* ---- View mode toggle ---- */
.view-toggle-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.view-toggle-label {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.toggle-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}
.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-track {
  width: 34px;
  height: 19px;
  background: var(--border);
  border-radius: 10px;
  position: relative;
  transition: background 0.2s;
}
.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 15px;
  height: 15px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.18);
}
.toggle-switch input:checked + .toggle-track { background: var(--text); }
.toggle-switch input:checked + .toggle-track .toggle-thumb { transform: translateX(15px); }

/* Card Area */
.qb-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem;
  gap: 1.25rem;
}

.flashcard-nav {
  display: flex;
  align-items: flex-start;
  gap: 1.75rem;
}

.arrow-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--navy);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.arrow-btn:hover {
  background: var(--text);
  border-color: var(--text);
  color: #fff;
}

/* Card (no flip) */
.card-container { width: 580px; max-width: 100%; }

.flashcard-card {
  background: var(--bg-card);
  border-radius: 4px;
  padding: 2.5rem 3rem;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.card-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-weight: 500;
}

.card-topic-badge {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 3px 10px;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  align-self: flex-start;
}

.card-question {
  font-size: 1.05rem;
  line-height: 1.72;
  font-weight: 400;
  color: var(--text);
  flex: 1;
}

.card-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.25rem;
}

.btn-show-answer {
  background: var(--text);
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.58rem 1.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-show-answer:hover { opacity: 0.65; }

.btn-hide-answer {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.55rem 1.2rem;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-hide-answer:hover { opacity: 0.5; }

/* Answer Reveal */
.card-answer-section {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  display: none;
  animation: fadeSlideIn 0.2s ease;
}
.card-answer-section.visible { display: block; }

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card-answer-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.55rem;
}
.card-answer-text {
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text);
}

.card-counter {
  font-size: 0.8rem;
  color: var(--grey);
  text-align: center;
  letter-spacing: 0.02em;
}

/* ================================
   GRID CARDS MODE
================================ */
.grid-cards-container {
  columns: 3 260px;
  column-gap: 1rem;
  padding: 1.75rem 2.5rem 4rem;
  width: 100%;
  box-sizing: border-box;
}

.gc-card {
  break-inside: avoid;
  margin-bottom: 1rem;
  perspective: 1200px;
  cursor: pointer;
}

.gc-card-inner {
  display: grid;
  transform-style: preserve-3d;
  transition: transform 0.52s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.gc-card.flipped .gc-card-inner { transform: rotateY(180deg); }

.gc-card-front,
.gc-card-back {
  grid-area: 1 / 1; /* same cell — container height = max(front, back) */
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.2rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.gc-card-back {
  transform: rotateY(180deg);
}

.gc-card:hover .gc-card-front { border-color: #C8C2B6; }
.gc-card.flipped:hover .gc-card-front { border-color: var(--border); }

.gc-badge {
  display: inline-block;
  font-size: 0.58rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid;
  border-radius: 2px;
  padding: 2px 7px;
  align-self: flex-start;
  flex-shrink: 0;
}

.gc-question {
  font-size: 0.87rem;
  line-height: 1.65;
  color: var(--text);
  font-weight: 400;
  flex: 1;
  min-height: 60px;
}

.gc-hint {
  font-size: 0.59rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
  opacity: 0.6;
}

.gc-answer-label {
  font-size: 0.59rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-weight: 500;
  flex-shrink: 0;
}

.gc-answer {
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--text);
  font-weight: 400;
}

.no-results {
  color: var(--grey);
  font-size: 1rem;
  text-align: center;
  padding: 4rem 2rem;
}

/* ================================
   STUDY GUIDE — INDEX
================================ */
.sg-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

.sg-hero {
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 3.5rem;
}

.sg-hero-eyebrow {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.sg-hero h1 {
  font-size: 3.8rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.sg-hero p {
  font-size: 0.97rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 540px;
  font-weight: 400;
}

.sg-section {
  margin-bottom: 3.25rem;
}

.sg-section-header {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 0;
}

.sg-section h2 {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.sg-section .section-count {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 400;
}

.sg-section-divider {
  width: 100%;
  height: 1px;
  background: #B8B2A8;
  margin: 0.7rem 0 0.2rem;
}

.sg-section.industry .sg-section-divider {
  background: var(--orange-pale);
}

.sg-topic-grid { display: flex; flex-direction: column; }

.sg-topic-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.05rem 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: -0.005em;
  transition: opacity 0.15s;
}
.sg-topic-row:hover {
  opacity: 0.45;
}
.sg-topic-row:hover .topic-tag { background: var(--orange-pale); }

.sg-topic-row .row-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sg-topic-row .topic-tag {
  font-size: 0.62rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 2px;
  background: transparent;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: background 0.12s;
}

.sg-section.industry .sg-topic-row .topic-tag {
  background: transparent;
  color: var(--text-muted);
}

.sg-topic-row .chevron {
  color: var(--border);
  font-size: 1.1rem;
}
.sg-topic-row:hover .chevron { color: var(--text-muted); }

/* ================================
   ARTICLE / TOPIC PAGE
================================ */
.article-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 3.5rem 2rem 6rem;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-bottom: 2.5rem;
  transition: opacity 0.2s;
}
.article-back:hover { opacity: 0.5; }

.article-tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.article-title {
  font-size: 3rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
}

.article-intro {
  font-size: 1.02rem;
  line-height: 1.82;
  color: var(--text-muted);
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  font-weight: 400;
}

.article-section { margin-bottom: 3rem; }

.article-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.1rem;
  letter-spacing: -0.015em;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border);
}

.article-section h3 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.55rem;
  margin-top: 1.5rem;
  text-transform: none;
  letter-spacing: 0.02em;
}

.article-section p {
  line-height: 1.85;
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  font-weight: 400;
}

.article-section ul,
.article-section ol {
  padding-left: 1.4rem;
  color: var(--text);
  line-height: 1.85;
  font-size: 0.95rem;
}
.article-section li { margin-bottom: 0.5rem; }

.article-callout {
  background: var(--bg-card);
  border-left: 2px solid var(--border);
  border-radius: 0 4px 4px 0;
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
}
.article-callout.orange {
  background: var(--orange-tint);
  border-color: var(--orange);
  color: var(--text);
}

/* --- Download Button Styles --- */
.download-section {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border); /* Matches your existing divider lines */
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background-color: transparent; 
  border: 1px solid var(--border);
  border-radius: 4px; /* Swapped from 30px to 4px to match your other cards */
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

/* Add the underline to the text specifically, with a slight offset so it looks clean */
.download-text {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.download-btn:hover {
  background-color: var(--orange-pale); /* Uses your custom pale orange on hover */
  border-color: var(--orange);
}

.paperclip-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted); /* Uses your muted gray */
  transition: transform 0.2s ease, color 0.2s ease;
}

.download-btn:hover .paperclip-icon {
  color: var(--orange-dark);
  transform: rotate(-10deg); /* Keeps the cute wiggle */
}