:root{
  --bg:#0b1020;
  --bgSecondary:#0f1730;
  --text:#e7eaf3;
  --textMuted:#9aa4c3;
  --accent:#7c5cff;
  --accentHover:#6a4ff0;
  --border:rgba(255,255,255,.10);
  --victory:rgba(124,92,255,.12);
  --lesson:rgba(46,212,167,.12);
  --danger:#ff4d6d;
  --shadow: 0 8px 30px rgba(0,0,0,.35);
  --radius: 18px;
  --radiusSm: 12px;
  --focus: 0 0 0 3px rgba(124,92,255,.22);
}

html, body { height: 100%; }
body{
  margin:0;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(124,92,255,.22), transparent 55%),
              radial-gradient(900px 520px at 110% 10%, rgba(46,212,167,.20), transparent 60%),
              var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  transition: background .2s ease, color .2s ease;
  overflow-x: hidden;
}

#app{ min-height: 100vh; }

::selection{ background: rgba(124,92,255,.28); }

.card{
  background: color-mix(in srgb, var(--bgSecondary) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.soft{
  background: color-mix(in srgb, var(--bgSecondary) 80%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radiusSm);
}

.btn{
  background: var(--accent);
  color: white;
  border-radius: 999px;
  padding: 12px 16px;
  font-weight: 650;
  transition: transform .12s ease, background .2s ease, opacity .2s ease;
  border: 1px solid color-mix(in srgb, var(--accent) 70%, white 0%);
  cursor: pointer;
}
.btn:hover{ background: var(--accentHover); }
.btn:active{ transform: translateY(1px); }
.btn:disabled{ opacity: .55; cursor: not-allowed; }

.btn-ghost{
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 999px;
  padding: 12px 16px;
  font-weight: 650;
  transition: background .2s ease, border-color .2s ease;
  color: var(--text);
  cursor: pointer;
}
.btn-ghost:hover{ background: rgba(255,255,255,.05); border-color: color-mix(in srgb, var(--border) 40%, var(--accent) 60%); }

.btn-danger{
  border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent);
  background: color-mix(in srgb, var(--danger) 18%, transparent);
  color: color-mix(in srgb, var(--danger) 90%, white);
}
.btn-danger:hover{ background: color-mix(in srgb, var(--danger) 26%, transparent); }

.input, .textarea{
  width: 100%;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 12px;
  outline: none;
  transition: box-shadow .2s ease, border-color .2s ease, background .2s ease;
  color: var(--text);
  box-sizing: border-box;
}
.textarea{ min-height: 110px; resize: vertical; }
.input:focus, .textarea:focus{ box-shadow: var(--focus); border-color: color-mix(in srgb, var(--accent) 70%, var(--border)); background: rgba(255,255,255,.05); }

/* Password input with toggle */
.pw-wrap{ position: relative; }
.pw-input{ padding-right: 46px; }
.pw-toggle{
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  display: grid;
  place-items: center;
  cursor: pointer;
}
.pw-toggle:hover{ background: rgba(255,255,255,.06); border-color: color-mix(in srgb, var(--border) 40%, var(--accent) 60%); }

/* AI rewrite button for textareas */
.ai-wrap{ position: relative; }
.ai-textarea{ padding-right: 46px; }
.ai-btn{
  position: absolute;
  right: 8px;
  top: 8px;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  display: grid;
  place-items: center;
  cursor: pointer;
}
.ai-btn:hover{ background: rgba(255,255,255,.06); border-color: color-mix(in srgb, var(--border) 40%, var(--accent) 60%); }
.ai-btn:disabled{ opacity: .55; cursor: not-allowed; }

.label{ color: var(--textMuted); font-size: 12px; letter-spacing: .02em; }

.link{ color: color-mix(in srgb, var(--accent) 80%, white); text-decoration: none; }
.link:hover{ text-decoration: underline; }

.pill{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: 999px;
  padding: 8px 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.divider{ height: 1px; background: var(--border); }

.fade-in{ animation: fadeIn .18s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.kbd{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 12px; border: 1px solid var(--border); padding: 2px 6px; border-radius: 8px; background: rgba(255,255,255,.04); }

/* Sidebar */
.sidebar-scrim{ background: rgba(0,0,0,.55); }
.sidebar{ background: color-mix(in srgb, var(--bgSecondary) 96%, transparent); border-right: 1px solid var(--border); }

/* Theme chips */
.theme-dot{
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform .12s ease, border-color .2s ease, box-shadow .2s ease;
  user-select: none;

  /* allow using as <button> without default button styles */
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255,255,255,.03);
  padding: 0;
  color: inherit;
  font: inherit;
}
.theme-dot:hover{ transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); }
.theme-dot[data-active="true"]{ box-shadow: var(--focus); border-color: color-mix(in srgb, var(--accent) 70%, var(--border)); }

.toast{
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  background: color-mix(in srgb, var(--bgSecondary) 92%, transparent);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  max-width: min(560px, calc(100vw - 28px));
  z-index: 60;
}
.hidden{ display:none !important; }

/* Layout helpers (minimal, no Tailwind reliance) */
.container{ width: min(920px, calc(100vw - 32px)); margin: 0 auto; }
.centerShell{ min-height: 100vh; padding: 40px 16px; }
.centerMax{ width: min(720px, calc(100vw - 32px)); margin: 0 auto; }

.header{
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
}
.headerRow{ display:flex; align-items:center; justify-content: space-between; gap: 12px; padding: 12px 0; }

.grid{ display: grid; gap: 12px; }
.grid2{ display:grid; gap:12px; grid-template-columns: 1fr; }
@media (min-width: 640px){ .grid2{ grid-template-columns: 1fr 1fr; } }

.row{ display:flex; gap: 10px; align-items:center; }
.rowBetween{ display:flex; gap: 10px; align-items:center; justify-content: space-between; }

.textMuted{ color: var(--textMuted); }

/* Modal */
.modalWrap{ position:fixed; inset:0; z-index: 80; display:grid; place-items:center; padding: 16px; overscroll-behavior: contain; }
.modalScrim{ position:absolute; inset:0; background: rgba(0,0,0,.55); }
.modalPanel{ position:relative; width: min(720px, calc(100vw - 32px)); max-height: min(82vh, 760px); overflow:auto; overscroll-behavior: contain; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}