/* Tutor Portfolio — base styles + theme tokens
   One base palette (paper/ink/hairline), theme only swaps the accent pair. */

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

:root {
  --paper: #F2EDE3;
  --ink: #211D17;
  --ink-soft: #55524A;
  --line: rgba(27, 22, 15, 0.14);
  --line-strong: rgba(27, 22, 15, 0.24);

  --accent: #0E6B4F;
  --accent-tint: #E4F0EA;
  --accent-ink: #0E6B4F;

  --radius: 3px;
  --content-width: 760px;
  --grid-width: 1120px;
}

[data-theme="emerald"]  { --accent: #0E6B4F; --accent-tint: #E4F0EA; }
[data-theme="deepblue"] { --accent: #1E3A5F; --accent-tint: #E4EAF1; }
[data-theme="teal"]     { --accent: #0B6E77; --accent-tint: #DFF0F1; }
[data-theme="burgundy"] { --accent: #7A2333; --accent-tint: #F4E4E7; }
[data-theme="sand"]     { --accent: #A9772F; --accent-tint: #F5ECDD; }
[data-theme="purple"]   { --accent: #5B3170; --accent-tint: #EFE4F2; }
[data-theme="dark"] {
  --paper: #14120F;
  --ink: #EDEAE2;
  --ink-soft: #B3AEA2;
  --line: rgba(237, 234, 226, 0.16);
  --line-strong: rgba(237, 234, 226, 0.28);
  --accent: #C79A4B;
  --accent-tint: #2A2317;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; max-width: 68ch; }

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

/* ---------- Top bar ---------- */
.topbar {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.topbar .container {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--accent); }

/* ---------- Directory ---------- */
.directory-header {
  padding: 56px 0 28px;
}
.directory-header h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  max-width: 20ch;
}
.directory-header p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.search-row {
  margin: 24px 0 40px;
}
.search-input {
  width: 100%;
  max-width: 420px;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.search-input::placeholder { color: var(--ink-soft); }
.search-input:focus { border-color: var(--accent); }

.search-count {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.tutor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 64px;
}
@media (max-width: 880px) {
  .tutor-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .tutor-grid { grid-template-columns: 1fr; }
}

.tutor-card {
  background: var(--paper);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.tutor-card:hover { background: var(--accent-tint); }

.tutor-card .card-top {
  display: flex;
  align-items: center;
  gap: 14px;
}
.tutor-card img.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  flex-shrink: 0;
}
.tutor-card .avatar-fallback {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-tint);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fraunces', serif;
  font-size: 1.3rem;
  flex-shrink: 0;
  border: 1px solid var(--line-strong);
}
.tutor-card h3 {
  font-size: 1.15rem;
  margin: 0;
}
.tutor-card .title {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 2px 0 0;
}
.tutor-card .summary {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.tag {
  font-size: 0.78rem;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
}
.tutor-card.featured { background: var(--accent-tint); }
.featured-mark {
  font-size: 0.75rem;
  color: var(--accent-ink);
  font-weight: 600;
}

.empty-state {
  padding: 60px 0;
  text-align: center;
  color: var(--ink-soft);
}

/* ---------- Profile page ---------- */
.profile-wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.profile-header {
  text-align: center;
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.photo-frame {
  width: 148px;
  height: 148px;
  margin: 0 auto 20px;
  position: relative;
  padding: 10px;
}
.photo-frame svg.corner-ornament {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--accent);
}
.photo-frame img,
.photo-frame .avatar-fallback {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  position: relative;
}
.photo-frame .avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-tint);
  color: var(--accent);
  font-family: 'Fraunces', serif;
  font-size: 2.6rem;
}

.profile-header h1 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
}
.profile-header .title {
  color: var(--accent-ink);
  font-size: 1.05rem;
  margin-bottom: 18px;
}
.profile-header .summary {
  color: var(--ink-soft);
  margin: 0 auto 24px;
  text-align: left;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.contact-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.92rem;
}
.contact-chip svg { flex-shrink: 0; color: var(--ink-soft); }
.contact-chip:hover { border-color: var(--accent); color: var(--accent-ink); }
.contact-chip:hover svg { color: var(--accent-ink); }

section.profile-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
section.profile-section:last-of-type { border-bottom: none; }
section.profile-section h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.teaching-group { margin-bottom: 18px; }
.teaching-group:last-child { margin-bottom: 0; }
.group-label {
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin: 0 0 8px;
}
.pill {
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-tint);
  color: var(--accent-ink);
}

.lang-list { list-style: none; padding: 0; margin: 0; }
.lang-list li {
  display: flex;
  justify-content: space-between;
  max-width: 320px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.lang-list li:last-child { border-bottom: none; }
.lang-list .level { color: var(--ink-soft); }

.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.video-item .frame {
  position: relative;
  padding-top: 56.25%;
  background: #000;
  border: 1px solid var(--line);
}
.video-item .frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-item h3 {
  font-size: 1.05rem;
  margin: 12px 0 4px;
}
.video-item p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- Certificates: two candidate display modes ---------- */
.cert-mode-toggle {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 20px;
  font-size: 0.85rem;
}
.cert-mode-toggle button {
  font-family: inherit;
  font-size: inherit;
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.cert-mode-toggle button.active {
  background: var(--accent);
  color: var(--paper);
}
.cert-mode-note {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin: -8px 0 20px;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.cert-card {
  border: 1px solid var(--line);
  padding: 16px;
  background: transparent;
  text-align: left;
  font-family: inherit;
  color: inherit;
  cursor: pointer;
}
.cert-card:hover { border-color: var(--accent); }
.cert-card h3 {
  font-size: 0.98rem;
  margin: 0 0 4px;
}
.cert-card .org {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0 0 2px;
}
.cert-card .date {
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.cert-card .view-hint {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--accent-ink);
}

/* Inline-expand mode */
.cert-inline-panel {
  display: none;
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-top: none;
  margin-top: -17px;
  padding: 16px;
}
.cert-inline-panel.open { display: block; }
.cert-inline-panel iframe, .cert-inline-panel img {
  width: 100%;
  max-height: 520px;
  border: 1px solid var(--line);
}

/* Modal/lightbox mode */
.cert-modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(20, 18, 14, 0.6);
  z-index: 50;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.cert-modal-backdrop.open { display: flex; }
.cert-modal {
  background: var(--paper);
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
}
.cert-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.cert-modal-head h3 { font-size: 1rem; margin: 0; }
.cert-modal-close {
  border: none;
  background: transparent;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  color: var(--ink-soft);
}
.cert-modal-body { padding: 0; flex: 1; overflow: auto; }
.cert-modal-body iframe, .cert-modal-body img {
  width: 100%;
  height: 60vh;
  border: 0;
  display: block;
}

.philosophy-quote {
  font-family: 'Fraunces', serif;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--ink);
  border-left: 2px solid var(--accent);
  padding-left: 18px;
  margin: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
  text-align: center;
}