:root {
  --bg: #0d1117;
  --card: #161b22;
  --card2: #1c2330;
  --accent: #e8c547;
  --accent2: #5bc4a8;
  --text: #f0ece4;
  --muted: #8b929a;
  --danger: #e05252;
  --success: #5bc4a8;
  --radius: 18px;
  --nav-h: 56px;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100dvh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(232,197,71,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 85%, rgba(91,196,168,0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* NAV */
.topnav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
  background: rgba(13,17,23,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.logo {
  font-family: 'Fraunces', serif;
  font-size: 20px;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.logo span { color: var(--accent2); font-style: italic; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-user { font-size: 13px; color: var(--muted); }
.nav-link { font-size: 13px; color: var(--muted); text-decoration: none; transition: color .2s; }
.nav-link:hover { color: var(--text); }
.nav-link--cta {
  background: var(--accent); color: #000;
  padding: 6px 14px; border-radius: 50px;
  font-weight: 500;
}
.nav-link--cta:hover { color: #000; opacity: 0.9; }

/* LAYOUT */
.app-shell { position: relative; z-index: 1; }
.main-content { max-width: 520px; margin: 0 auto; padding: 24px 20px 60px; }

/* MESSAGES */
.messages { margin-bottom: 16px; }
.message {
  padding: 12px 16px; border-radius: 10px;
  font-size: 14px; margin-bottom: 8px;
  background: var(--card); border: 1px solid rgba(255,255,255,0.08);
}
.message--error { border-color: var(--danger); color: var(--danger); }
.message--success { border-color: var(--success); color: var(--success); }

/* DASHBOARD */
.dash-header { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.dash-title { font-family: 'Fraunces', serif; font-size: 26px; }
.due-badge {
  background: rgba(232,197,71,0.15);
  border: 1px solid rgba(232,197,71,0.3);
  color: var(--accent);
  padding: 5px 12px; border-radius: 50px; font-size: 13px;
}
.stats-row { display: flex; gap: 10px; margin-bottom: 28px; }
.stat-card {
  flex: 1; background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 14px; padding: 16px 12px; text-align: center;
}
.stat-num { font-family: 'Fraunces', serif; font-size: 28px; color: var(--accent); }
.stat-label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-top: 2px; }

.section-title {
  font-family: 'Fraunces', serif; font-size: 18px;
  color: var(--muted); margin-bottom: 12px; margin-top: 8px;
}
.cat-grid { display: flex; flex-direction: column; gap: 10px; }
.cat-card {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 16px;
  display: flex; align-items: flex-start; gap: 14px;
  transition: border-color .2s;
}
.cat-card:hover { border-color: rgba(255,255,255,0.15); }
.cat-card__icon { font-size: 28px; flex-shrink: 0; margin-top: 2px; }
.cat-card__body { flex: 1; min-width: 0; }
.cat-card__name-es { font-family: 'Fraunces', serif; font-size: 17px; color: var(--text); }
.cat-card__name-en { font-size: 13px; color: var(--muted); margin-top: 2px; }
.cat-card__meta { font-size: 12px; color: var(--muted); margin-top: 6px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.due-chip {
  background: rgba(232,197,71,0.15); color: var(--accent);
  padding: 2px 8px; border-radius: 50px; font-size: 11px;
}
.progress-bar-wrap {
  height: 3px; background: rgba(255,255,255,0.07);
  border-radius: 10px; margin-top: 8px; overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 10px; transition: width .4s;
}
.cat-card__actions { display: flex; flex-direction: column; gap: 6px; flex-shrink: 0; }

/* SESSIONS */
.sessions-list { display: flex; flex-direction: column; gap: 6px; margin-top: 4px; }
.session-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 10px;
  background: var(--card); border: 1px solid rgba(255,255,255,0.06);
  font-size: 13px;
}
.session-cat { flex: 1; }
.session-stats { color: var(--accent2); font-weight: 500; }
.session-date { color: var(--muted); font-size: 12px; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 500;
  text-decoration: none; cursor: pointer; border: none;
  transition: all .2s;
}
.btn:active { transform: scale(0.96); }
.btn--primary { background: var(--accent); color: #000; }
.btn--primary:hover { opacity: .9; }
.btn--ghost {
  background: transparent; color: var(--muted);
  border: 1px solid rgba(255,255,255,0.12);
}
.btn--ghost:hover { color: var(--text); border-color: rgba(255,255,255,0.25); }
.btn--sm { padding: 7px 14px; font-size: 12px; }

/* PRACTICE SHELL */
.practice-shell { display: flex; flex-direction: column; min-height: calc(100dvh - var(--nav-h)); }
.practice-header {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 8px; flex-wrap: wrap;
}
.back-link { font-size: 14px; color: var(--muted); text-decoration: none; }
.back-link:hover { color: var(--text); }
.practice-title { font-family: 'Fraunces', serif; font-size: 18px; flex: 1; }
.mode-toggle { display: flex; gap: 6px; }
.mode-btn {
  padding: 6px 14px; border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent; color: var(--muted);
  font-size: 13px; text-decoration: none;
  transition: all .2s;
}
.mode-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

.progress-wrap {
  height: 3px; background: rgba(255,255,255,0.07);
  border-radius: 10px; margin-bottom: 20px; overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 10px; transition: width .4s;
}

/* FLIP CARD */
.card-wrap { display: flex; flex-direction: column; gap: 16px; flex: 1; }
.flip-card { perspective: 1000px; height: 260px; cursor: pointer; }
.flip-card__inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
}
.flip-card__inner.flipped { transform: rotateY(180deg); }
.flip-card__front, .flip-card__back {
  position: absolute; inset: 0;
  border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 28px 24px;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
}
.flip-card__front {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.08);
}
.flip-card__back {
  background: var(--card2);
  border: 1px solid rgba(91,196,168,0.25);
  transform: rotateY(180deg);
}
.card-lang {
  font-size: 10px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; opacity: .8;
}
.flip-card__back .card-lang { color: var(--accent2); }
.card-word {
  font-family: 'Fraunces', serif; font-size: 38px; font-weight: 700;
  text-align: center; line-height: 1.15; letter-spacing: -1px;
}
.card-gender { font-size: 13px; color: var(--muted); margin-top: 6px; font-style: italic; }
.card-hint { font-size: 13px; color: var(--muted); margin-top: 6px; text-align: center; }
.card-example { font-size: 13px; color: var(--muted); margin-top: 8px; text-align: center; font-style: italic; }
.card-example--en { color: rgba(139,146,154,0.7); font-size: 12px; }
.tap-hint { font-size: 11px; color: rgba(255,255,255,0.18); margin-top: 16px; letter-spacing: .5px; }

.speak-btn {
  position: absolute; bottom: 12px; right: 12px;
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--muted); font-size: 15px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all .2s;
}
.speak-btn:active { background: rgba(232,197,71,0.15); color: var(--accent); transform: scale(.92); }

.miss-indicator {
  text-align: center; font-size: 12px;
  color: var(--danger); opacity: .7; letter-spacing: .5px;
}

/* GRADE BUTTONS */
.grade-row { display: flex; gap: 10px; }
.grade-btn {
  flex: 1; padding: 15px 10px; border-radius: 14px; border: none;
  font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 500;
  cursor: pointer; transition: all .2s;
}
.grade-btn:active { transform: scale(0.96); }
.grade-btn--miss { background: rgba(224,82,82,0.18); color: var(--danger); border: 1px solid rgba(224,82,82,0.3); }
.grade-btn--close { background: rgba(232,197,71,0.13); color: var(--accent); border: 1px solid rgba(232,197,71,0.25); }
.grade-btn--got { background: rgba(91,196,168,0.18); color: var(--success); border: 1px solid rgba(91,196,168,0.3); }

/* QUIZ OPTIONS */
.quiz-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.quiz-btn {
  padding: 16px 12px; border-radius: 14px;
  background: var(--card); border: 1px solid rgba(255,255,255,0.08);
  color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 14px;
  cursor: pointer; transition: all .2s; text-align: center;
}
.quiz-btn:active { transform: scale(0.96); }
.quiz-btn--correct { background: rgba(91,196,168,0.2)!important; border-color: var(--success)!important; color: var(--success)!important; }
.quiz-btn--wrong { background: rgba(224,82,82,0.2)!important; border-color: var(--danger)!important; color: var(--danger)!important; }

/* GRADE FLASH */
.grade-flash {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 52px; pointer-events: none;
  animation: flashPop .6s ease forwards;
  z-index: 200;
}
.grade-flash--miss { color: var(--danger); }
.grade-flash--close { color: var(--accent); }
.grade-flash--got { color: var(--success); }
@keyframes flashPop {
  0% { opacity:0; transform: translate(-50%,-50%) scale(.7); }
  30% { opacity:1; transform: translate(-50%,-50%) scale(1.1); }
  100% { opacity:0; transform: translate(-50%,-50%) scale(1.3); }
}

/* SESSION COMPLETE */
.session-complete {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 16px; padding: 40px 0;
}
.complete-emoji { font-size: 56px; }
.complete-title { font-family: 'Fraunces', serif; font-size: 32px; color: var(--accent); }
.complete-sub { font-size: 15px; color: var(--muted); max-width: 280px; line-height: 1.6; }

/* CARD SPINNER */
.card-spinner { display: flex; justify-content: center; align-items: center; height: 260px; }
.spinner {
  width: 32px; height: 32px; border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* SCREEN READER ONLY */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* HOME PAGE */
.home-hero { padding: 40px 0 20px; }
.home-title { font-family: 'Fraunces', serif; font-size: 36px; line-height: 1.2; margin-bottom: 12px; }
.home-title em { color: var(--accent); font-style: italic; }
.home-sub { font-size: 16px; color: var(--muted); line-height: 1.7; margin-bottom: 28px; max-width: 380px; }
.home-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* ALLAUTH FORMS */
.auth-card {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 28px 24px;
  max-width: 400px; margin: 32px auto 0;
}
.auth-title { font-family: 'Fraunces', serif; font-size: 24px; margin-bottom: 20px; }
.auth-field { margin-bottom: 16px; }
.auth-field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.auth-field input {
  width: 100%; padding: 11px 14px; border-radius: 10px;
  background: var(--bg); border: 1px solid rgba(255,255,255,0.1);
  color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 15px;
}
.auth-field input:focus { outline: none; border-color: var(--accent2); }
.auth-submit {
  width: 100%; padding: 13px;
  background: var(--accent); color: #000;
  border: none; border-radius: 50px;
  font-family: 'DM Sans', sans-serif; font-size: 15px; font-weight: 500;
  cursor: pointer; margin-top: 8px;
}
.auth-alt { font-size: 13px; color: var(--muted); text-align: center; margin-top: 16px; }
.auth-alt a { color: var(--accent2); text-decoration: none; }