/* ============================================================
   SeaScribe — Minimalist + Dark Mode + Animations
   ============================================================ */

/* ---- Theme ---- */
:root, [data-theme="light"] {
  --bg:       #fafafa;
  --surface:  #ffffff;
  --text:     #1a1a1a;
  --muted:    #999;
  --border:   #e5e5e5;
  --dark:     #1a1a1a;
  --accent:   #d6394e;
  --hover:    #f5f5f5;
  --orb-bg:   #f0f0f0;
  --slider-track: #ddd;
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%23999' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

[data-theme="dark"] {
  --bg:       #1a1a1a;
  --surface:  #262626;
  --text:     #e5e5e5;
  --muted:    #888;
  --border:   #3a3a3a;
  --dark:     #e5e5e5;
  --accent:   #f06070;
  --hover:    #333;
  --orb-bg:   #333;
  --slider-track: #444;
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%23888' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

:root {
  --radius:   12px;
  --gap:      14px;
  --ease:     cubic-bezier(0.22, 0.61, 0.36, 1);
}

*, *::before, *::after { box-sizing:border-box; margin:0; padding:0; }
html { font-size: 17px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* ============================
   TOPBAR
   ============================ */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-wrap: wrap;
  transition: background 0.3s, border-color 0.3s;
}

.topbar-brand {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  cursor: pointer;
  user-select: none;
  transition: opacity 0.15s;
}
.topbar-brand:hover { opacity: 0.7; }

.topbar-author { font-size: 0.8rem; color: var(--muted); font-style: italic; }
.topbar-spacer { flex: 1; }

.tool-btn {
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text);
  display: flex;
  align-items: center; justify-content: center;
  transition: background 0.15s, border-color 0.15s;
}
.tool-btn:hover { background: var(--hover); }

.icon-btn { font-size: 1rem; border: none; background: transparent; }

/* ---- topbar picker ---- */
.topbar-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-select {
  max-width: 120px;
  font-size: 0.82rem;
  padding: 5px 26px 5px 10px;
}

.btn-sm {
  padding: 5px 12px;
  font-size: 0.82rem;
}

.pick-result {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  min-width: 5em;
  text-align: center;
  display: inline-block;
  white-space: nowrap;
  transition: color 0.3s;
}

@keyframes nameStop {
  0%   { transform: scale(1.4); }
  100% { transform: scale(1); }
}

/* ---- fullscreen pick overlay ---- */
.pick-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

.pick-overlay.hidden { display: none; }

.pick-overlay-text {
  font-size: 12vw;
  font-weight: 800;
  color: var(--text);
  transition: color 0.3s;
}

.pick-overlay-text.pop {
  animation: nameStop 0.35s var(--ease);
}

.pick-overlay.shrink {
  animation: overlayFade var(--shrink-dur, 1s) var(--ease) forwards;
}

.pick-overlay.shrink .pick-overlay-text {
  animation: shrinkToCorner var(--shrink-dur, 1s) var(--ease) forwards;
}

@keyframes overlayFade {
  0%   { background: var(--bg); }
  100% { background: transparent; }
}

@keyframes shrinkToCorner {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(var(--dx), var(--dy)) scale(var(--scale)); }
}

.fs-btn {
  font-size: 0.75rem;
  font-weight: 600;
  width: 28px; height: 28px;
}

.tool-val {
  font-size: 0.8rem; color: var(--text);
  font-weight: 500; min-width: 3.2em; text-align: center;
}

/* ============================
   PAGE TRANSITIONS
   ============================ */
.page {
  margin: 0 auto;
  padding: 32px 24px 60px;
}
.page.hidden { display: none; }

.hidden { display: none; }

.page-exit {
  animation: pageOut 0.22s var(--ease) forwards;
}
.page-enter {
  animation: pageIn 0.28s var(--ease) forwards;
}

@keyframes pageOut {
  to { opacity: 0; transform: translateY(-8px); }
}
@keyframes pageIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-hero { text-align: center; margin-bottom: 32px; }
.page-title { font-size: 1.6rem; font-weight: 700; }
.page-sub { font-size: 0.9rem; color: var(--muted); margin-top: 6px; }

/* ============================
   SUBJECT CARDS
   ============================ */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--gap);
}

.subject-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  display: flex; flex-direction: column; align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.subject-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.subject-icon { font-size: 2.6rem; line-height:1; }
.subject-name { font-size: 1.2rem; font-weight:700; }
.subject-desc { font-size: 0.8rem; color:var(--muted); text-align:center; }

/* ============================
   DICTATION PAGE
   ============================ */
.dictation-header {
  display: flex; align-items: center; gap: 16px; margin-bottom: 20px;
}

.back-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s;
}
.back-btn:hover { background: var(--hover); }

/* ---- controls ---- */
.controls { margin-bottom: 20px; }

.plugin-config-row {
  margin-bottom: 12px;
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
}

.control-row {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}

.control-item {
  display: flex; align-items: center; gap: 6px;
}

.ctrl-label {
  font-size: 0.8rem; color: var(--muted); font-weight: 500;
}

/* ---- stepper ---- */
.stepper {
  display: flex; align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
}
.stepper-btn {
  width: 32px; height: 32px;
  border: none; background: var(--surface);
  font-size: 1rem; cursor: pointer;
  color: var(--text);
  transition: background 0.15s;
  display: flex; align-items: center; justify-content: center;
}
.stepper-btn:hover { background: var(--hover); }
.stepper-val {
  width: 34px; text-align: center;
  font-weight: 600; font-size: 0.9rem;
}

/* stepper with editable input */
.stepper-input {
  width: 50px; height: 32px;
  text-align: center;
  border: none;
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem; font-weight: 600;
  -moz-appearance: textfield;
}
.stepper-input::-webkit-inner-spin-button,
.stepper-input::-webkit-outer-spin-button { -webkit-appearance:none; margin:0; }
.stepper-input:focus { outline: none; background: var(--hover); }

/* ---- font slider ---- */
.font-slider {
  -webkit-appearance: none;
  width: 80px; height: 6px;
  border-radius: 3px;
  background: var(--slider-track);
  outline: none; cursor: pointer;
}
.font-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--dark);
  border: 2px solid var(--surface);
  cursor: pointer;
}
.font-slider::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--dark);
  border: 2px solid var(--surface);
  cursor: pointer;
}

/* ---- beautiful selects ---- */
.range-select {
  appearance: none;
  -webkit-appearance: none;
  padding: 8px 32px 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px 12px;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
  max-width: 160px;
  text-overflow: ellipsis;
  /* thin scrollbar for the dropdown popup */
  scrollbar-width: thin;
  scrollbar-color: var(--muted) transparent;
}
.range-select::-webkit-scrollbar {
  width: 6px;
}
.range-select::-webkit-scrollbar-track {
  background: transparent;
}
.range-select::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 3px;
}
.range-select:hover {
  border-color: var(--muted);
  background-color: var(--hover);
}
.range-select:focus {
  outline: none;
  border-color: var(--dark);
  box-shadow: 0 0 0 3px rgba(128,128,128,0.1);
}
.range-select option {
  background: var(--surface);
  color: var(--text);
  padding: 8px;
}
.range-sep {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  user-select: none;
}

.ctrl-sep {
  width: 16px;
}

/* ---- import button ---- */
.import-btn {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.import-btn input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.import-msg {
  font-size: 0.82rem;
  font-weight: 500;
}
.import-msg.loading  { color: var(--muted); }
.import-msg.success  { color: #4caf50; }
.import-msg.error    { color: #f44336; }

/* ---- url input ---- */
.url-input {
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.88rem;
  width: 280px;
  transition: border-color 0.2s;
}
.url-input::placeholder { color: var(--muted); }
.url-input:focus { outline: none; border-color: var(--dark); }

/* ---- buttons ---- */
.btn {
  padding: 9px 18px; border: none; border-radius: 8px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.btn-dark { background: var(--dark); color: var(--bg); }
.btn-dark:hover { opacity: 0.85; }
.btn-ghost {
  background: transparent; color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--text); color: var(--text); }
.btn-ghost:disabled { opacity: 0.35; cursor: default; }

/* ============================
   CARDS
   ============================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  transition: grid-template-columns 0.35s var(--ease);
}

.card-grid.grid-morph {
  /* slight opacity pulse during column change */
  animation: gridPulse 0.35s var(--ease);
}

@keyframes gridPulse {
  0%   { opacity: 1; }
  50%  { opacity: 0.7; }
  100% { opacity: 1; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex; flex-direction: column; gap: 8px;
  animation: fadeUp 0.4s var(--ease) both;
  transition: background 0.3s, border-color 0.3s;
  min-width: 0;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card-num { font-size: 0.75rem; color: var(--muted); font-weight: 500; }

.card-prompt {
  display: flex; align-items: baseline; gap: 6px;
  font-size: calc(1em * var(--card-font-scale, 1));
}

.card-symbol {
  font-size: 1.6em; font-weight: 700;
  letter-spacing: 0.02em; line-height: 1;
}

.card-cn { font-size: 0.8em; color: var(--muted); font-weight: 400; }

/* ---- answers ---- */
.card-answers {
  padding-top: 8px;
  border-top: 1px dashed var(--border);
  opacity: 0; max-height: 0; overflow: hidden;
  transition: all 0.35s var(--ease);
  font-size: calc(0.9em * var(--card-font-scale, 1));
}
.card-answers.visible {
  opacity: 1; max-height: 300px; overflow: visible;
}

.a-line {
  display: flex; align-items: baseline; gap: 6px;
  margin-bottom: 2px; flex-wrap: wrap;
}
.a-label {
  font-size: 0.85em; color: var(--accent);
  font-weight: 600; min-width: 3.2em; flex-shrink: 0;
}
.a-val { font-weight: 600; word-break: break-all; }
.a-val sup { font-size: 0.65em; color: var(--accent); }
.a-val.orbital {
  font-family: "SF Mono", "Cascadia Code", "Fira Code", "Consolas", "Microsoft YaHei", monospace;
  font-size: 0.88em; letter-spacing: 0.03em;
  background: var(--orb-bg);
  padding: 1px 5px; border-radius: 4px;
  white-space: normal; word-break: break-all; line-height: 1.5;
}

/* ============================
   SPLASH
   ============================ */
.splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: splashOut 0.6s var(--ease) 1.8s forwards;
  pointer-events: none;
}

.splash-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: splashIn 0.8s var(--ease) both;
}

.splash-icon {
  font-size: 4rem;
  animation: splashBounce 0.7s var(--ease) 0.1s both;
}

.splash-title {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: rgba(255,255,255,0.95);
  animation: splashFade 0.5s var(--ease) 0.5s both;
}

[data-theme="light"] .splash-title {
  color: rgba(0,0,0,0.85);
}

.splash-author {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.65);
  font-style: italic;
  animation: splashFade 0.5s var(--ease) 0.7s both;
}

[data-theme="light"] .splash-author {
  color: rgba(0,0,0,0.5);
}

@keyframes splashIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes splashOut {
  to { opacity: 0; visibility: hidden; }
}

@keyframes splashBounce {
  0%   { opacity: 0; transform: scale(0.3); }
  60%  { opacity: 1; transform: scale(1.12); }
  100% { transform: scale(1); }
}

@keyframes splashFade {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 640px) {
  .card-grid { grid-template-columns: 1fr 1fr; }
  .subject-grid { grid-template-columns: 1fr 1fr; }
  .topbar { padding: 12px 14px; gap: 8px; }
  .page { padding: 16px 10px 32px; }
  .control-row { gap: 8px; }
}

@media (min-width: 1600px) {
  .page { padding: 32px 48px 60px; }
}