/* =========================================================
   1) Base (tokens + global)
   ========================================================= */
/* Avatar image */
#avatar-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background-color: var(--surface);
  transition: opacity 0.5s ease;
}

/* Hidden preloaded images */
.preload-images {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* Theme tokens (light) */
:root {
  /* Layout */
  --radius: 12px;
  --radius-sm: 10px;

  /* Surfaces (increase contrast for hierarchy) */
  --bg: #f2f5f8;
  --page-overlay: rgba(242, 245, 248, 0.90);
  --surface: rgba(255, 255, 255, 0.98);
  --surface-2: rgba(245, 248, 252, 0.98);
  --surface-3: rgba(235, 240, 246, 0.98);

  /* Navigation (separate layer) */
  --nav-surface: rgba(255, 255, 255, 0.84);
  --nav-border: rgba(205, 212, 224, 0.90);
  --nav-shadow: 0 12px 30px rgba(17, 24, 39, 0.10);

  /* Typography */
  --text: rgba(31, 41, 55, 0.94);
  --muted: rgba(102, 112, 133, 0.92);

  /* Lines / accents */
  --border: rgba(205, 212, 224, 0.95);
  --accent: #1f4e79;          /* muted academic navy */
  --accent-strong: #163a5c;
  --accent-weak: rgba(31, 78, 121, 0.12);

  /* Status */
  --danger: #b42318;
  --danger-strong: #8a1c13;

  /* Shadows */
  --shadow-xs: 0 1px 6px rgba(17, 24, 39, 0.06);
  --shadow-sm: 0 2px 10px rgba(17, 24, 39, 0.08);
  --shadow: 0 10px 28px rgba(17, 24, 39, 0.10);
  --shadow-lg: 0 18px 50px rgba(17, 24, 39, 0.12);

  /* Texture */
  --paper-texture: url("https://www.transparenttextures.com/patterns/paper-fibers.png");
}

/* Base document */
html {
  height: 100%;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.35s ease, color 0.35s ease;
}

body {
  min-height: 100%;
  margin: 0;
  padding: 0;
  font-family: "Georgia", serif;
  line-height: 1.55;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.35s ease, color 0.35s ease;
}

/* Sensible defaults */
* { box-sizing: border-box; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
a:hover { color: var(--accent-strong); text-decoration: underline; }

::selection {
  background: var(--accent-weak);
}

@font-face {
  font-family: 'CygnetRound';
  src: url('./assets/fonts/CygnetRound.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}


/* =========================================================
   2) Shared pages (Resume / Social / Toolkit / Schedule)
   ========================================================= */
/* Shared content styling (Resume / Social / Toolkit / Schedule) */
#resume, #social, #toolkit, #schedule, #meditations {
  position: relative;
  z-index: 1;
  display: none;
  padding: calc(var(--topnav-height, 72px) + 40px) 20px 40px !important;
  background:
    radial-gradient(1200px 640px at 20% -10%, rgba(31, 78, 121, 0.07), transparent 60%),
    linear-gradient(var(--page-overlay), var(--page-overlay)),
    var(--paper-texture);
  min-height: 100vh;
  overflow-y: auto;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}

#resume.visible, #social.visible, #toolkit.visible, #schedule.visible, #meditations.visible {
  display: block;
  opacity: 1;
}

.container {
  max-width: 95%;
  margin: 0 auto;

  /* Slight tint so inner cards (sections / grids) pop more */
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--surface) 92%, var(--surface-2)),
    var(--surface-2)
  );

  padding: 30px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.resume-heading {
  font-size: 2.6em;
  text-align: center;
  color: var(--accent);
  margin-bottom: 10px;
}

.contact-info {
  text-align: center;
  margin-bottom: 20px;
  color: var(--muted);
}

h2 {
  font-variant: small-caps;
  color: var(--accent);
  font-size: 1.35em;
  margin-top: 20px;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.section {
  position: relative;
  overflow: hidden;

  padding: 15px;
  margin-bottom: 20px;
  border-radius: var(--radius-sm);

  background: linear-gradient(
    180deg,
    var(--surface),
    color-mix(in srgb, var(--surface) 70%, var(--surface-2))
  );

  border: 1px solid color-mix(in srgb, var(--border) 85%, var(--accent-weak));
  box-shadow: var(--shadow-xs);

  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.section:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.subheading {
  display: flex;
  justify-content: space-between;
  font-size: 1.03em;
  margin-bottom: 8px;
  gap: 12px;
}

.subheading-title {
  font-weight: 700;
  color: var(--accent);
}

.subsubheading {
  font-style: italic;
  font-size: 0.95em;
  color: var(--muted);
}

ul {
  padding-left: 20px;
  margin: 0;
  list-style-type: disc;
}

li {
  font-size: 1em;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 8px;
}

ul li::marker {
  font-size: 0.6em;
}

.highlight {
  color: var(--accent);
  font-weight: 700;
}

a.download-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.95em;
  margin-top: 8px;
  display: inline-block;
}

a.download-link:hover {
  text-decoration: underline;
}

.email + .email {
  margin-left: 20px;
}

/* Floating controls (theme / clock / back) */

/* Theme toggle button */
#toggle-btn, #toggle-btn-social, #toggle-btn-toolkit, #toggle-btn-schedule {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 24px;
  cursor: pointer;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;

  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);

  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;

  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

#toggle-btn::before, #toggle-btn-social::before, #toggle-btn-toolkit::before, #toggle-btn-schedule::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: var(--accent-weak);
  opacity: 0;
  transition: opacity 0.2s ease;
}

#toggle-btn:hover, #toggle-btn-social:hover, #toggle-btn-toolkit:hover, #toggle-btn-schedule:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  background: var(--surface-2);
}

#toggle-btn:hover::before, #toggle-btn-social:hover::before, #toggle-btn-toolkit:hover::before, #toggle-btn-schedule:hover::before {
  opacity: 1;
}

#toggle-btn:active, #toggle-btn-social:active, #toggle-btn-toolkit:active, #toggle-btn-schedule:active {
  transform: translateY(0) scale(0.96);
  box-shadow:
    var(--shadow-xs),
    inset 0 2px 8px rgba(0, 0, 0, 0.16),
    inset 0 -1px 0 rgba(255, 255, 255, 0.08);
}

/* Toggle button icon */
#toggle-btn span, #toggle-btn-social span, #toggle-btn-toolkit span, #toggle-btn-schedule span {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: Arial, sans-serif;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
  padding: 0;
}

/* Clock widget */
#clock, #clock-social, #clock-toolkit, #clock-schedule {
  position: fixed;
  top: 20px;
  left: 70px;

  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);

  padding: 12px 18px;
  border-radius: 26px;
  font-size: 1em;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;

  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;

  font-family: Arial, sans-serif;
  font-weight: 700;
  letter-spacing: 0.6px;
}

#clock:hover, #clock-social:hover, #clock-toolkit:hover, #clock-schedule:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  background: var(--surface-2);
}

/* Clock toggle button */
.clock-toggle {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 40px;
  height: 40px;
  border-radius: 24px;

  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);

  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10000;

  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.clock-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  background: var(--surface-2);
}

/* Clock collapsed state */
#clock.collapsed, #clock-social.collapsed, #clock-toolkit.collapsed, #clock-schedule.collapsed {
  transform: translateX(-150%);
  opacity: 0;
  pointer-events: none;
}

/* Back button */
.back-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 40px;
  height: 40px;

  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);

  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;

  box-shadow: var(--shadow-sm);
  z-index: 100;

  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.back-btn.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-btn:hover {
  transform: translateY(-3px);
  background: var(--surface-2);
  box-shadow: var(--shadow);
}

/* Back button icon */
.back-btn i {
  pointer-events: none;
}

/* Ensure buttons do not show on cover page */
#cover #toggle-btn,
#cover #clock,
#cover #resume-back-btn,
#cover #social-back-btn,
#cover #toolkit-back-btn,
#cover #schedule-back-btn,
#cover .clock-toggle {
  display: none;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    max-width: 98%;
    padding: 20px;
  }
  .resume-heading { font-size: 2.1em; }
  h2 { font-size: 1.2em; }

  #clock, #clock-social, #clock-toolkit, #clock-schedule {
    left: 60px;
    padding: 10px 14px;
    font-size: 0.95em;
  }
}

/* Resume hero */

.section.resume-hero {
  display: flex;
  align-items: stretch;
  gap: 22px;
}

.resume-hero-avatar {
  flex: 0 0 clamp(120px, 16vw, 170px);
  align-self: stretch; /* match the computed section height (driven by text lines) */
}

.resume-hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;

  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.resume-hero-body {
  flex: 1 1 auto;
  min-width: 0;

  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 10px;
}

.resume-hero-name {
  font-size: 2.2em;          /* close to original, but suited for left-aligned layout */
  font-weight: 700;
  line-height: 1.08;
  color: var(--accent);
}

.resume-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.contact-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  padding: 8px 12px;
  border-radius: 999px; /* half-round ends */
  border: 1px solid color-mix(in srgb, var(--border) 78%, var(--accent-weak));
  background: color-mix(in srgb, var(--surface) 84%, var(--accent-weak));
  box-shadow: var(--shadow-xs);

  color: var(--text);
  font-size: 0.98em;
  line-height: 1;
  white-space: nowrap;
}

.contact-pill strong {
  font-weight: 700;
  color: var(--muted);
}

.contact-pill a {
  color: inherit;
  text-decoration: none;
}
.contact-pill a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
}

.resume-hero-intro {
  margin: 0;
  color: var(--muted);
  font-size: 1.02em;
  line-height: 1.55;
}

/* Responsive: stack photo above text on small screens */
@media (max-width: 768px) {
  .section.resume-hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .resume-hero-avatar {
    flex: 0 0 auto;
    width: min(240px, 70vw);
  }

  .resume-hero-avatar img {
    height: auto;
    aspect-ratio: 4 / 5;
  }

  .resume-hero-name {
    font-size: 1.95em;
  }
}

/* Inline expanders */
.expander {
  /* Inline, borderless trigger */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 6px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  line-height: 1;
  font-size: 0.95em;

  /* Give the arrow a predictable hit area without adding frames */
  width: 16px;
  height: 16px;
  position: relative;
  transform: translateY(0.5px);
  -webkit-tap-highlight-color: transparent;
}

.expander i {
  /* Hide legacy icon (FontAwesome/etc). We draw a custom arrow with ::before. */
  display: none;
}

/* Custom arrow */
.expander::before {
  content: "";
  width: 14px;
  height: 14px;
  display: block;

  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent) 92%, white),
    color-mix(in srgb, var(--accent) 85%, transparent)
  );

  /* Slight inward curve (concave) via clip-path */
  clip-path: polygon(
    8% 50%,
    46% 8%,
    40% 32%,
    58% 42%,
    92% 50%,
    58% 58%,
    40% 68%,
    46% 92%
  );

  border-radius: 3px;
  opacity: 0.9;

  transition:
    transform 0.18s ease,
    opacity 0.18s ease,
    filter 0.18s ease;

  filter: drop-shadow(0 0.4px 0.8px rgba(0, 0, 0, 0.22));
}

/* Hover highlight */
.expander::after {
  content: "";
  position: absolute;
  inset: 1px;
  pointer-events: none;

  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.75),
    rgba(255, 255, 255, 0) 55%
  );
  clip-path: polygon(
    10% 50%,
    46% 10%,
    41% 33%,
    58% 43%,
    90% 50%,
    58% 57%,
    41% 67%,
    46% 90%
  );

  opacity: 0;
  transition: opacity 0.18s ease;
  mix-blend-mode: screen;
}

.expander:hover::before {
  opacity: 1;
  transform: translateX(1px);
  filter:
    drop-shadow(0 0.6px 1.1px rgba(0, 0, 0, 0.24))
    drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 32%, transparent));
}

.expander:hover::after {
  opacity: 0.55;
}

/* 初始向右，展开后向上（90deg → -90deg） */
.expander.is-open::before {
  transform: rotate(-90deg);
  opacity: 1;
}

/* Keep keyboard accessibility without adding visible “frames” */
.expander:focus-visible {
  outline: none;
  filter: drop-shadow(0 0 0.6px rgba(0, 0, 0, 0.18));
}

@media (prefers-reduced-motion: reduce) {
  .expander::before,
  .expander::after {
    transition: none;
  }
}

.expand-row {
  display: none;
}

.expand-row.is-open {
  /* Default: expanders used in normal (non-table) layouts */
  display: block;
}

/* Expanders used inside <table> keep valid table layout */
tr.expand-row.is-open {
  display: table-row;
}

.expand-content {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed color-mix(in srgb, var(--border) 80%, transparent);
  display: grid;
  gap: 12px;
  align-items: start;
}

/* When there are multiple media items: 3 per row, left-aligned */
.expand-content.is-multi {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  justify-content: start;
  justify-items: start;
}

/* When there is only one media item: center it at 1/3 of the section width */
.expand-content.is-single {
  grid-template-columns: minmax(0, 33.333%);
  justify-content: center;
  justify-items: center;
}

/* Item wrapper: can be <a> (clickable) or <div> (static) */
.expand-item {
  width: 100%;
  display: block;
}

.expand-item,
.expand-item:visited {
  color: inherit;
  text-decoration: none;
}

.expand-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--radius-sm) - 2px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}

/* Subtle hover affordance for linked items (still "only image") */
a.expand-item {
  cursor: pointer;
}

a.expand-item:hover img {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

a.expand-item img {
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

/* Responsive: avoid overly tiny tiles on mobile */
@media (max-width: 768px) {
  .expand-content.is-multi {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .expand-content.is-single {
    grid-template-columns: minmax(0, min(360px, 80%));
  }
}

/* Legacy: keep compatibility with old markup (<img class="expand-media">) */
.expand-media {
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--radius-sm) - 2px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}

.expand-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--border) 78%, var(--accent-weak));
  background: color-mix(in srgb, var(--surface) 86%, var(--accent-weak));
  color: var(--accent);
  font-family: Arial, sans-serif;
  font-weight: 700;
  font-size: 0.92em;
  letter-spacing: 0.2px;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: var(--shadow-xs);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.expand-action-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  background: var(--surface-2);
}


/* =========================================================
   3) Dark mode overrides
   ========================================================= */
/* Theme tokens (dark) */
body.dark-mode {
  /* Let the browser render native controls (inputs, scrollbars) in dark style */
  color-scheme: dark;

  /* Surfaces (neutral, not overly blue) */
  --bg: #0f1217;
  --page-overlay: rgba(15, 18, 23, 0.92);
  --surface: rgba(23, 28, 36, 0.96);
  --surface-2: rgba(30, 36, 46, 0.94);
  --surface-3: rgba(18, 22, 30, 0.96);

  /* Navigation (separate layer) */
  --nav-surface: rgba(18, 22, 30, 0.90);
  --nav-border: rgba(211, 219, 232, 0.14);
  --nav-shadow: 0 14px 40px rgba(0, 0, 0, 0.60);

  /* Typography */
  --text: rgba(232, 237, 244, 0.96);
  --muted: rgba(165, 174, 188, 0.92);

  /* Lines / accents (same hue family as light mode: muted academic navy) */
  --border: rgba(211, 219, 232, 0.18);
  --accent: #8fb3d6;
  --accent-strong: #b4d2ec;
  --accent-weak: rgba(143, 179, 214, 0.16);

  /* Status */
  --danger: #e46a5e;
  --danger-strong: #ff7c6f;

  /* Shadows (slightly stronger than light mode, but still soft) */
  --shadow-xs: 0 2px 10px rgba(0, 0, 0, 0.28);
  --shadow-sm: 0 3px 14px rgba(0, 0, 0, 0.35);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 55px rgba(0,  0, 0, 0.60);

  /* Texture is usually too noisy in dark mode */
  --paper-texture: none;

  background-color: var(--bg);
  color: var(--text);
}

/* Dark-mode tweaks for specific components */

/* FullCalendar (prevents default bright/bluish panel in dark mode) */
body.dark-mode .fc {
  --fc-page-bg-color: var(--surface);
  --fc-neutral-bg-color: var(--surface-2);
  --fc-neutral-text-color: var(--text);
  --fc-border-color: var(--border);

  --fc-button-text-color: var(--text);
  --fc-button-bg-color: var(--surface);
  --fc-button-border-color: var(--border);
  --fc-button-hover-bg-color: var(--surface-2);
  --fc-button-hover-border-color: var(--border);
  --fc-button-active-bg-color: var(--accent);
  --fc-button-active-border-color: var(--accent);

  --fc-event-bg-color: var(--accent-weak);
  --fc-event-border-color: var(--border);
  --fc-event-text-color: var(--text);

  --fc-today-bg-color: var(--accent-weak);
}

/* Slightly tone down very colorful toolkit icon blocks in dark mode */
body.dark-mode .toolkit-icon {
  filter: saturate(0.55) contrast(0.95) brightness(0.90);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Hover underline color in dark mode */
body.dark-mode a:hover {
  text-decoration-color: rgba(180, 210, 236, 0.55);
}