/* ============================================================
   NOLIQ — Main Stylesheet
   assets/css/noliq.css
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Nunito:wght@400;600;700;800&display=swap');

:root {
  --paper:   #fdf6e3;
  --paper2:  #f7eccc;
  --paper3:  #eedd9e;
  --ink:     #2c1f0e;
  --ink2:    #5a3e1b;
  --ink3:    #8a6340;
  --teal:    #1a7a6e;
  --teal2:   #145f55;
  --gold:    #c97d0a;
  --gold2:   #a36608;
  --sage:    #3d6b4a;
  --rust:    #b83025;
  --border:  #cdb08a;
  --shadow:  rgba(44,31,14,0.13);
  --radius:  14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Nunito', sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  background-image: repeating-linear-gradient(
    0deg, transparent, transparent 27px,
    rgba(196,168,120,0.18) 27px, rgba(196,168,120,0.18) 28px
  );
}

/* ── HEADER ─────────────────────────────────────────────── */
.noliq-header {
  background: var(--ink);
  padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 3px 10px var(--shadow);
  position: sticky; top: 0; z-index: 100;
}

.noliq-logo {
  font-family: 'Fredoka', sans-serif;
  font-size: 24px; font-weight: 700;
  color: var(--paper2); letter-spacing: 1.5px;
  display: flex; align-items: center; gap: 8px;
  text-decoration: none;
}

.logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--gold); flex-shrink: 0; }

.header-user {
  display: flex; align-items: center; gap: 14px;
  font-size: 13px; color: rgba(253,246,227,0.7); font-weight: 700;
}

/* ── NAV TABS ───────────────────────────────────────────── */
.noliq-nav {
  background: var(--paper2);
  border-bottom: 2px solid var(--border);
  display: flex; overflow-x: auto; padding: 0 16px;
}

.nav-tab {
  padding: 13px 18px; border: none; background: transparent;
  color: var(--ink2); font-family: 'Fredoka', sans-serif;
  font-size: 15px; font-weight: 500; cursor: pointer;
  border-bottom: 3px solid transparent; transition: all 0.18s;
  white-space: nowrap; text-decoration: none; display: inline-block;
}

.nav-tab:hover  { color: var(--teal); border-bottom-color: var(--teal); background: rgba(26,122,110,0.06); }
.nav-tab.active { color: var(--teal); border-bottom-color: var(--teal); font-weight: 700; background: rgba(26,122,110,0.08); }

/* ── MAIN CONTENT ───────────────────────────────────────── */
.noliq-main { padding: 30px 22px; max-width: 820px; margin: 0 auto; }

/* ── CARDS / PANELS ─────────────────────────────────────── */
.panel {
  background: #fff; border: 2px solid var(--border);
  border-radius: var(--radius); padding: 26px;
  box-shadow: 0 4px 0 var(--paper3); margin-bottom: 20px;
}

.panel-title {
  font-family: 'Fredoka', sans-serif; font-size: 20px; font-weight: 700;
  color: var(--ink); margin-bottom: 18px;
}

/* ── BUTTONS ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 24px; border: none; border-radius: var(--radius);
  font-family: 'Fredoka', sans-serif; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.18s; text-decoration: none;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--teal); color: #fff;
  box-shadow: 0 4px 0 var(--teal2);
}
.btn-primary:hover { background: #1d8a7c; transform: translateY(-2px); box-shadow: 0 6px 0 var(--teal2); }
.btn-primary:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--teal2); }

.btn-gold {
  background: var(--gold); color: #fff;
  box-shadow: 0 4px 0 var(--gold2);
}
.btn-gold:hover { background: #da8c10; transform: translateY(-2px); }

.btn-ghost {
  background: #fff; color: var(--ink2);
  border: 2px solid var(--border);
  box-shadow: 0 3px 0 var(--border);
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }

.btn-danger { background: var(--rust); color: #fff; box-shadow: 0 3px 0 #8c1d15; }
.btn-danger:hover { background: #cc3526; transform: translateY(-1px); }

.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* ── FORMS ──────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block; font-size: 13px; font-weight: 800;
  color: var(--ink2); margin-bottom: 6px; letter-spacing: 0.3px;
}

.form-input, .form-select {
  width: 100%; padding: 13px 16px;
  background: #fff; border: 2px solid var(--border); border-radius: 12px;
  color: var(--ink); font-family: 'Nunito', sans-serif; font-size: 15px; font-weight: 700;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus, .form-select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(26,122,110,0.12);
}

.form-input::placeholder { color: var(--ink3); font-weight: 600; }

/* ── ALERTS ─────────────────────────────────────────────── */
.alert { padding: 13px 17px; border-radius: 12px; font-size: 14px; font-weight: 800; border: 2px solid; margin-bottom: 16px; }
.alert-success { border-color: var(--sage); background: rgba(61,107,74,0.08); color: var(--sage); }
.alert-error   { border-color: var(--rust); background: rgba(184,48,37,0.07); color: var(--rust); }
.alert-info    { border-color: var(--teal); background: rgba(26,122,110,0.07); color: var(--teal); }

/* ── PROGRESS BAR ───────────────────────────────────────── */
.progress-bar {
  height: 10px; background: var(--paper3); border-radius: 100px;
  margin-bottom: 24px; border: 1px solid var(--border); overflow: hidden;
}
.progress-fill {
  height: 100%; background: linear-gradient(90deg, var(--teal), var(--sage));
  border-radius: 100px; transition: width 0.4s ease;
}

/* ── STUDY CARD (flashcard) ─────────────────────────────── */
.card-scene { width: 100%; max-width: 580px; height: 260px; perspective: 1200px; cursor: pointer; margin: 0 auto; }
.card-inner { width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 0.5s cubic-bezier(0.23,1,0.32,1); position: relative; }
.card-inner.flipped { transform: rotateY(180deg); }
.card-face { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; border-radius: 18px; padding: 28px; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.card-front { background: #fff; border: 3px solid var(--border); box-shadow: 0 6px 0 var(--paper3), 0 10px 28px var(--shadow); }
.card-back  { background: var(--teal); border: 3px solid var(--teal2); box-shadow: 0 6px 0 var(--teal2); transform: rotateY(180deg); }
.card-label { font-family: 'Fredoka', sans-serif; font-size: 11px; font-weight: 600; letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 14px; }
.card-front .card-label { color: var(--ink3); }
.card-back  .card-label { color: rgba(255,255,255,0.65); }
.card-term-text { font-family: 'Fredoka', sans-serif; font-size: 28px; font-weight: 600; text-align: center; line-height: 1.25; color: var(--ink); }
.card-def-text  { font-family: 'Nunito', sans-serif; font-size: 17px; font-weight: 800; text-align: center; line-height: 1.35; color: #fff; }
.card-hint { position: absolute; bottom: 16px; font-size: 12px; font-weight: 700; }
.card-front .card-hint { color: var(--ink3); }
.card-back  .card-hint { color: rgba(255,255,255,0.55); }

/* ── QUIZ OPTIONS ───────────────────────────────────────── */
.quiz-option {
  width: 100%; padding: 14px 18px; border-radius: 12px;
  border: 2px solid var(--border); background: #fff;
  color: var(--ink); font-family: 'Nunito', sans-serif; font-size: 15px; font-weight: 800;
  cursor: pointer; text-align: left; transition: all 0.15s;
  display: flex; align-items: center; gap: 12px; margin-bottom: 10px;
  box-shadow: 0 2px 0 var(--paper3);
}
.quiz-option:hover:not(:disabled) { border-color: var(--teal); background: rgba(26,122,110,0.05); transform: translateX(4px); }
.quiz-option.correct { border-color: var(--sage); background: rgba(61,107,74,0.1); color: var(--sage); }
.quiz-option.wrong   { border-color: var(--rust); background: rgba(184,48,37,0.08); color: var(--rust); }
.opt-letter {
  width: 30px; height: 30px; border-radius: 8px; border: 2px solid var(--border);
  background: var(--paper2); display: flex; align-items: center; justify-content: center;
  font-family: 'Fredoka', sans-serif; font-size: 13px; font-weight: 700; color: var(--ink2); flex-shrink: 0;
}

/* ── MATCH TILES ────────────────────────────────────────── */
.match-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); gap: 10px; }
.match-tile {
  padding: 14px 12px; border-radius: 14px; border: 2px solid var(--border); background: #fff;
  font-family: 'Nunito', sans-serif; font-size: 13px; font-weight: 800; color: var(--ink);
  cursor: pointer; text-align: center; transition: all 0.15s;
  min-height: 68px; display: flex; align-items: center; justify-content: center;
  line-height: 1.3; box-shadow: 0 3px 0 var(--paper3);
}
.match-tile:hover:not(.matched):not(.selected) { border-color: var(--teal); transform: translateY(-2px); }
.match-tile.selected { border-color: var(--gold); background: rgba(201,125,10,0.1); color: var(--gold2); transform: translateY(-2px); }
.match-tile.matched  { border-color: var(--sage); background: rgba(61,107,74,0.1); color: var(--sage); opacity: 0.65; cursor: default; }
.match-tile.wrong-flash { border-color: var(--rust); background: rgba(184,48,37,0.1); animation: shk 0.35s ease; }
@keyframes shk { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* ── SCORE BOARD ────────────────────────────────────────── */
.score-board { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 40px 20px; }
.score-circle {
  width: 136px; height: 136px; border-radius: 50%; border: 5px solid;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: #fff; box-shadow: 0 6px 22px var(--shadow);
}
.score-num { font-family: 'Fredoka', sans-serif; font-size: 44px; font-weight: 700; line-height: 1; }
.score-lbl { font-size: 10px; font-weight: 800; letter-spacing: 2px; color: var(--ink3); }
.score-msg { font-family: 'Fredoka', sans-serif; font-size: 24px; font-weight: 700; color: var(--ink); }

/* ── STATS TABLE ────────────────────────────────────────── */
.stats-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.stats-table th { background: var(--paper2); color: var(--ink2); font-weight: 800; padding: 10px 14px; text-align: left; border-bottom: 2px solid var(--border); font-family: 'Fredoka', sans-serif; font-size: 13px; letter-spacing: 0.5px; }
.stats-table td { padding: 10px 14px; border-bottom: 1px solid var(--paper3); color: var(--ink); font-weight: 700; }
.stats-table tr:hover td { background: rgba(26,122,110,0.04); }

/* ── SET LIST ───────────────────────────────────────────── */
.set-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; background: #fff; border: 2px solid var(--border);
  border-radius: var(--radius); margin-bottom: 10px; transition: border-color 0.15s;
  box-shadow: 0 2px 0 var(--paper3);
}
.set-item:hover { border-color: var(--teal); }
.set-topic { font-family: 'Fredoka', sans-serif; font-size: 17px; font-weight: 700; color: var(--ink); }
.set-meta  { font-size: 12px; color: var(--ink3); font-weight: 700; margin-top: 3px; }
.set-actions { display: flex; gap: 8px; }

/* ── LOADING ────────────────────────────────────────────── */
.loading-dots { display: inline-flex; gap: 5px; align-items: center; }
.loading-dots span { width: 8px; height: 8px; border-radius: 50%; background: currentColor; animation: bdot 0.8s infinite; }
.loading-dots span:nth-child(2) { animation-delay: 0.15s; }
.loading-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bdot { 0%,80%,100%{transform:scale(0.5)} 40%{transform:scale(1)} }

/* ── LOGIN PAGE ─────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--paper);
  background-image: repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(196,168,120,0.18) 27px, rgba(196,168,120,0.18) 28px);
}
.login-box {
  background: #fff; border: 3px solid var(--border); border-radius: 20px;
  padding: 40px 36px; width: 100%; max-width: 400px;
  box-shadow: 0 8px 0 var(--paper3), 0 12px 36px var(--shadow);
}
.login-logo { font-family: 'Fredoka', sans-serif; font-size: 32px; font-weight: 700; color: var(--ink); text-align: center; margin-bottom: 6px; }
.login-sub  { text-align: center; color: var(--ink3); font-size: 14px; font-weight: 700; margin-bottom: 28px; }

/* ── DASHBOARD GRID ─────────────────────────────────────── */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; margin-bottom: 28px; }
.dash-card {
  background: #fff; border: 2px solid var(--border); border-radius: var(--radius);
  padding: 20px 16px; text-align: center; cursor: pointer; transition: all 0.18s;
  box-shadow: 0 4px 0 var(--paper3); text-decoration: none; color: var(--ink);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.dash-card:hover { border-color: var(--teal); transform: translateY(-3px); box-shadow: 0 7px 0 rgba(26,122,110,0.2); }
.dash-card-icon { font-size: 32px; }
.dash-card-label { font-family: 'Fredoka', sans-serif; font-size: 16px; font-weight: 700; color: var(--ink); }

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 600px) {
  .noliq-main { padding: 20px 14px; }
  .login-box  { padding: 28px 20px; margin: 16px; }
  .card-term-text { font-size: 22px; }
  .match-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── UTILITY ────────────────────────────────────────────── */
.text-center { text-align: center; }
.mt-1  { margin-top: 8px;  }
.mt-2  { margin-top: 16px; }
.mt-3  { margin-top: 24px; }
.mb-2  { margin-bottom: 16px; }
.flex  { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 10px; }
.w-full { width: 100%; }
.hidden { display: none; }

/* ── PWA / MOBILE ENHANCEMENTS ──────────────────────────── */

/* Safe area padding for notched phones */
.noliq-header {
  padding-top: max(14px, env(safe-area-inset-top));
  padding-left: max(28px, env(safe-area-inset-left));
  padding-right: max(28px, env(safe-area-inset-right));
}

body {
  padding-bottom: env(safe-area-inset-bottom);
}

/* Remove tap highlight on mobile */
* { -webkit-tap-highlight-color: transparent; }

/* Prevent text selection during card flip */
.card-scene { user-select: none; -webkit-user-select: none; }

/* Touch-friendly tap targets — min 44px */
.btn      { min-height: 44px; }
.nav-tab  { min-height: 48px; }
.quiz-option { min-height: 52px; }
.match-tile  { min-height: 60px; }

/* Smooth scrolling */
html { scroll-behavior: smooth; -webkit-overflow-scrolling: touch; }

/* Standalone mode (installed PWA) */
@media (display-mode: standalone) {
  .noliq-header {
    padding-top: max(18px, env(safe-area-inset-top));
  }
}

/* Small phones */
@media (max-width: 380px) {
  .gen-title   { font-size: 30px; }
  .card-term-text { font-size: 20px; }
  .match-grid  { grid-template-columns: repeat(2, 1fr); }
  .dash-grid   { grid-template-columns: repeat(2, 1fr); }
  .noliq-main  { padding: 16px 12px; }
}

/* Landscape phone */
@media (max-height: 500px) and (orientation: landscape) {
  .card-scene { height: 200px; }
  .score-board { padding: 20px; gap: 12px; }
  .generate-wrap { padding: 12px 0; gap: 16px; }
}