:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #637083;
  --primary: #123b6d;
  --primary-2: #1f6fb2;
  --border: #dbe3ee;
  --soft: #eef5ff;
  --success: #0f766e;
  --danger: #b42318;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #eef5ff 0%, var(--bg) 260px);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 248, 251, 0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(219, 227, 238, 0.72);
}
.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--primary);
}
.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow);
}
.nav-links { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 650;
}
.nav-links a.active, .nav-links a:hover { color: var(--primary); background: #fff; }

.hero {
  padding: 54px 0 32px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}
h1 { font-size: clamp(28px, 4vw, 42px); line-height: 1.15; margin: 16px 0; letter-spacing: -0.02em; }
h2 { font-size: clamp(20px, 3vw, 28px); line-height: 1.25; margin: 12px 0; color: var(--primary); }
h3 { font-size: clamp(16px, 2.5vw, 22px); line-height: 1.3; margin: 10px 0; color: var(--primary); }
.lead { color: var(--muted); font-size: 18px; line-height: 1.75; max-width: 760px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.btn {
  border: 0;
  border-radius: 14px;
  padding: 12px 18px;
  font-weight: 800;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow); }
.btn-secondary { background: #fff; color: var(--primary); border: 1px solid var(--border); }
.btn-small { padding: 8px 12px; border-radius: 10px; font-size: 13px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-card { padding: 24px; }
.hero-card h2 { margin-top: 0; color: var(--primary); }
.check-list { padding: 0; list-style: none; display: grid; gap: 12px; }
.check-list li { display: flex; gap: 10px; color: var(--muted); line-height: 1.5; }
.check-list li::before { content: "✓"; color: var(--success); font-weight: 900; }

.section { padding: 28px 0; }
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.section-title h2 { margin: 0; font-size: 28px; color: var(--primary); }
.section-title p { margin: 6px 0 0; color: var(--muted); }
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.page-title { font-size: clamp(24px, 3.5vw, 36px); margin-bottom: 8px; }
.stats-layout { padding-bottom: 48px; font-size: 14px; }
.stats-layout th, .stats-layout td { padding: 10px; font-size: 13px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 12px; display: grid; gap: 4px; }
.stat-card span { color: var(--muted); font-size: 12px; font-weight: 700; }
.stat-card strong { color: var(--primary); font-size: 22px; line-height: 1; }
.stat-card .stat-date { font-size: 12px; line-height: 1.35; }
.bar-list { display: grid; gap: 12px; }
.bar-row { display: grid; gap: 5px; }
.bar-label { display: flex; justify-content: space-between; gap: 12px; color: var(--text); font-weight: 700; font-size: 13px; }
.bar-label strong { color: var(--primary); }
.bar-track { height: 8px; border-radius: 999px; background: var(--soft); overflow: hidden; border: 1px solid var(--border); }
.bar-fill { height: 100%; background: var(--primary-2); border-radius: 999px; }

.feature-card { padding: 20px; }
.feature-card h3 { margin: 0 0 10px; color: var(--primary); }
.feature-card p { margin: 0; color: var(--muted); line-height: 1.65; }

.app-layout {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 18px;
  padding: 28px 0 48px;
}
.panel { padding: 18px; }
.panel h2, .panel h3 { color: var(--primary); margin-top: 0; }
.form-grid { display: grid; gap: 14px; }
.field { display: grid; gap: 7px; }
label { color: #344054; font-weight: 750; font-size: 14px; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 12px;
  padding: 11px 12px;
  font: inherit;
  outline: none;
}
textarea { min-height: 88px; resize: vertical; line-height: 1.55; }
input:focus, select:focus, textarea:focus { border-color: var(--primary-2); box-shadow: 0 0 0 4px rgba(31,111,178,.12); }
.inline-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.help { color: var(--muted); font-size: 13px; line-height: 1.45; }

.output-box {
  min-height: 440px;
  white-space: pre-wrap;
  line-height: 1.65;
  background: #0f172a;
  color: #e6edf7;
  border-radius: 18px;
  padding: 20px;
  overflow: auto;
  border: 1px solid #1e293b;
}
.toolbar { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.status { color: var(--muted); font-size: 14px; }
.status.error { color: var(--danger); }
.status.success { color: var(--success); }

.template-list { display: grid; gap: 12px; }
.template-item { padding: 16px; border: 1px solid var(--border); border-radius: 16px; background: #fff; }
.template-item h3 { margin: 0 0 6px; color: var(--primary); }
.template-item p { margin: 0 0 10px; color: var(--muted); line-height: 1.5; }
.tags { color: var(--primary-2); font-weight: 700; font-size: 13px; }

.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 14px; overflow: hidden; }
th, td { border-bottom: 1px solid var(--border); padding: 12px; text-align: left; vertical-align: top; }
th { background: var(--soft); color: var(--primary); }

.footer { padding: 28px 0; color: var(--muted); text-align: center; }

@media (max-width: 900px) {
  .hero, .app-layout { grid-template-columns: 1fr; }
  .grid-3, .grid-2, .stats-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .container { width: min(100% - 20px, 1180px); }
  .nav { align-items: center; padding: 12px 0; }
  .inline-fields { grid-template-columns: 1fr; }
}
.auth-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.auth-links a, .link-button {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--primary);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 750;
  cursor: pointer;
  font: inherit;
}
.auth-links .btn-mini { background: var(--primary); color: #fff; border-color: var(--primary); }
.user-chip { color: var(--muted); font-size: 13px; font-weight: 700; padding: 8px 10px; background: var(--soft); border-radius: 999px; }
.narrow-page { max-width: 680px; padding: 34px 0 56px; }
.mini-output { max-height: 260px; overflow: auto; white-space: pre-wrap; line-height: 1.55; border-radius: 14px; padding: 14px; background: #0f172a; color: #e6edf7; }
.developer-footer { background: #fff; border-top: 1px solid var(--border); line-height: 1.8; }
@media (max-width: 900px) { .nav { align-items: flex-start; } .auth-links { width: 100%; } }
.checkbox-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.checkbox-card { border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; background: #fff; display: flex; align-items: flex-start; gap: 8px; color: var(--text); font-weight: 700; }
.checkbox-card small { display: block; color: var(--muted); font-weight: 500; margin-top: 2px; }
.danger-btn { background: var(--danger); }
.storage-meter { height: 12px; border-radius: 999px; overflow: hidden; border: 1px solid var(--border); background: var(--soft); }
.storage-meter span { display: block; height: 100%; background: var(--primary-2); }
@media (max-width: 700px) { .checkbox-grid { grid-template-columns: 1fr; } }

.nav-links a, .auth-links a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.developer-footer {
  padding: 16px 0;
  text-align: center;
  font-size: 13px;
}

/* On desktop: hide the text for the Home menu item so it displays as icon only */
.nav-links a[href="/"] .nav-text {
  display: none;
}
.menu-toggle {
  display: none;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 26px;
    cursor: pointer;
    color: var(--primary);
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
    order: 2;
  }
  .menu-toggle:hover {
    background: var(--soft);
  }
  .logo {
    order: 1;
  }
  
  .nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    position: relative;
  }

  /* Hide navigation and authentication links by default on mobile/tablet */
  .nav-links, .auth-links {
    display: none !important;
  }

  /* Display vertically when hamburger menu is active */
  .nav-links.menu-open, .auth-links.menu-open {
    display: flex !important;
    flex-direction: column;
    width: 100%;
    gap: 8px;
    padding: 10px 0;
    border-top: 1px solid var(--border);
    order: 3;
    align-items: flex-start;
  }
  .auth-links.menu-open {
    border-top: none;
    padding-top: 0;
  }

  .nav-links a, .auth-links a, .auth-links button {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 14px;
    border-radius: 8px;
  }

  /* Make text visible again on mobile for all links including Home */
  .nav-links a[href="/"] .nav-text {
    display: inline !important;
  }
}

@media (max-width: 600px) {
  .logo span:not(.logo-mark) {
    display: none;
  }
  .logo::after {
    content: "Teacher PG";
    font-weight: 800;
  }
}

.logo-mark {
  display: none !important;
}

@media (min-width: 769px) {
  body {
    background: linear-gradient(90deg, #f8fafc 0%, var(--bg) 100%);
  }
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    height: 100vh;
    border-right: 1px solid rgba(219, 227, 238, 0.72);
    border-bottom: none;
    background: #f8fafc;
    box-shadow: 2px 0 8px rgba(0,0,0,0.02);
    z-index: 100;
    overflow-y: auto;
  }
  .nav {
    flex-direction: column !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    height: 100%;
    min-height: 100vh;
    padding: 18px 12px;
    gap: 16px;
    box-sizing: border-box;
  }
  .logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
    width: 100%;
  }
  .logo span:not(.logo-mark) {
    font-size: 14px;
    line-height: 1.2;
    display: inline !important;
  }
  .nav-links {
    display: flex !important;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    width: 100%;
  }
  .nav-links a {
    width: 100%;
    padding: 8px 12px;
    border-radius: var(--radius);
    box-sizing: border-box;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  .auth-links {
    display: flex !important;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-top: auto;
    width: 100%;
    border-top: 1px solid var(--border);
    padding-top: 12px;
  }
  .auth-links a, .auth-links button {
    width: 100%;
    box-sizing: border-box;
    padding: 8px 12px;
    border-radius: var(--radius);
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-align: left;
  }
  .auth-links .user-chip {
    display: block;
    padding: 6px 10px;
    border-radius: 8px;
    background: var(--soft);
    font-size: 11px;
    color: var(--muted);
    text-align: center;
    margin-bottom: 2px;
    white-space: normal;
    word-break: break-all;
  }
  .auth-links button {
    justify-content: flex-start;
  }
  main.container {
    margin-left: 280px !important;
    margin-right: auto !important;
    width: calc(100% - 300px) !important;
    max-width: 1200px !important;
    box-sizing: border-box;
  }
  .developer-footer {
    margin-left: 260px !important;
    width: calc(100% - 260px) !important;
    box-sizing: border-box;
  }
  .nav-links a[href="/"] .nav-text {
    display: inline !important;
  }
}