/* LakshyaOne — Daily PYQs styles */

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

:root {
  --bg:        #0D0D0D;
  --card:      #141414;
  --bg-card:   #141414;
  --bg-hover:  #1C1C1C;
  --surface:   #1C1C1C;
  --elevated:  #242424;
  --border:    #2A2A2A;
  --border-hi: #383838;
  --text:      #F0F0F0;
  --secondary: #888888;
  --primary:   #4E5FC0;
  --primary-hover: #0070E0;
  --success:   #30D158;
  --danger:    #FF453A;
  --warning:   #FFD60A;
  --radius:    12px;
  --radius-sm: 8px;
  --font: 'Manrope', -apple-system, "SF Pro Display", "SF Pro Text", BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body { background: var(--bg); color: var(--text); font-family: var(--font); min-height: 100vh; -webkit-font-smoothing: antialiased; }

/* ── NAV ── */
.nav { position: sticky; top: 0; z-index: 100; background: #0D0D0D; border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; height: 56px; }
.nav-logo { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.nav-logo-mark { width: 28px; height: 28px; background: var(--primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 14px; }
.nav-logo-text { font-weight: 700; font-size: 15px; color: var(--text); }
.nav-center { display: flex; gap: 4px; }
.nav-link { padding: 6px 14px; border-radius: 8px; text-decoration: none; font-size: 13px; font-weight: 500; color: var(--secondary); transition: background .15s, color .15s; }
.nav-link:hover { background: rgba(255,255,255,.04); color: var(--text); }
.nav-link.active { background: rgba(78,95,192,.08); color: var(--primary); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.nav-avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; color: var(--text); cursor: default; }
.nav-logout-btn { background: none; border: none; color: var(--secondary); cursor: pointer; padding: 6px; border-radius: 8px; display: flex; align-items: center; transition: color .15s, background .15s; }
.nav-logout-btn:hover { background: rgba(217,123,123,.1); color: var(--danger); }

/* ── MAIN ── */
.main { max-width: 900px; margin: 0 auto; padding: 32px 20px 80px; }

/* ── PAGE HEADER ── */
.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 28px; gap: 16px; flex-wrap: wrap; }
.page-header-left h1 { font-size: 26px; font-weight: 700; color: var(--text); letter-spacing: -.3px; }
.page-header-left p  { font-size: 14px; color: var(--secondary); margin-top: 4px; }

.pyq-timer {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 16px; font-size: 14px; font-weight: 700; color: var(--primary); white-space: nowrap;
}
.pyq-timer.pyq-timer-up { color: var(--danger); border-color: rgba(255,69,58,.3); }

/* ── LOADING / EMPTY / LOCKED ── */
.pyq-loading, .pyq-empty { text-align: center; padding: 40px 20px; color: var(--secondary); font-size: 14px; }

.pyq-locked { text-align: center; padding: 70px 20px; }
.pyq-locked-icon { font-size: 40px; margin-bottom: 14px; }
.pyq-locked h2 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.pyq-locked p { font-size: 14px; color: var(--secondary); max-width: 420px; margin: 0 auto 20px; line-height: 1.5; }
.pyq-upgrade-btn {
  display: inline-block; background: var(--primary); color: #fff; text-decoration: none;
  font-weight: 700; font-size: 14px; padding: 12px 28px; border-radius: var(--radius-sm);
  transition: background .15s;
}
.pyq-upgrade-btn:hover { background: var(--primary-hover); }

/* ── SUBJECT BLOCKS ── */
.pyq-subject-block { margin-bottom: 32px; }
.pyq-subject-title {
  font-size: 15px; font-weight: 700; color: var(--primary); text-transform: uppercase;
  letter-spacing: .5px; margin-bottom: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--border);
}

/* ── QUESTION CARD ── */
.pyq-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin-bottom: 14px;
}

.pyq-card-top { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.pyq-card-num { font-size: 13px; font-weight: 800; color: var(--text); }
.pyq-chapter-tag { font-size: 12px; color: var(--secondary); background: rgba(255,255,255,.04); border-radius: 6px; padding: 3px 9px; }

.pyq-status-badge { margin-left: auto; font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 20px; white-space: nowrap; }
.pyq-status-badge.is-pending { background: rgba(168,162,158,.1); color: var(--secondary); }
.pyq-status-badge.is-correct { background: rgba(48,209,88,.12); color: var(--success); }
.pyq-status-badge.is-wrong   { background: rgba(255,69,58,.12);  color: var(--danger); }

.pyq-question-text { font-size: 15px; line-height: 1.6; color: var(--text); margin-bottom: 6px; }
.pyq-source-tag { font-size: 11px; color: var(--secondary); margin-bottom: 14px; opacity: .8; }

/* ── METADATA CHIPS (difficulty / format / year) ── */
.pyq-meta-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.pyq-meta-chip {
  font-size: 10.5px; font-weight: 700; letter-spacing: .3px;
  padding: 3px 9px; border-radius: 20px;
  background: rgba(255,255,255,.05); color: var(--secondary);
  border: 1px solid var(--border);
}
.pyq-meta-chip.diff-easy   { color: var(--success); border-color: rgba(48,209,88,.3);  background: rgba(48,209,88,.08); }
.pyq-meta-chip.diff-medium { color: var(--warning); border-color: rgba(255,214,10,.3); background: rgba(255,214,10,.08); }
.pyq-meta-chip.diff-hard   { color: var(--danger);  border-color: rgba(255,69,58,.3);  background: rgba(255,69,58,.08); }

/* ── OPTIONS ── */
.pyq-options { display: flex; flex-direction: column; gap: 8px; }
.pyq-option {
  display: flex; align-items: center; gap: 12px; text-align: left;
  background: var(--elevated); border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; cursor: pointer;
  transition: border-color .18s, background .18s, transform .12s;
  font-family: var(--font); color: var(--text); font-size: 14px;
}
.pyq-option:hover:not([disabled]) { border-color: var(--primary); background: rgba(78,95,192,.06); }
.pyq-option[disabled] { cursor: default; opacity: .9; }
.pyq-option-letter {
  width: 24px; height: 24px; flex-shrink: 0; border-radius: 50%; background: rgba(255,255,255,.06);
  display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: var(--secondary);
  transition: background .18s, color .18s;
}
.pyq-option-mark { margin-left: auto; font-size: 15px; font-weight: 800; flex-shrink: 0; }

/* Correct/wrong states — the actual color feedback shown once an answer is
   locked in. (Previously only added as a class with no matching rules for
   numerical questions, so locking an answer visibly did nothing.) */
.pyq-option-correct { border-color: var(--success); background: rgba(48,209,88,.1); animation: pyq-lock-in .3s ease; }
.pyq-option-correct .pyq-option-letter { background: var(--success); color: #fff; }
.pyq-option-correct .pyq-option-mark { color: var(--success); }
.pyq-option-wrong { border-color: var(--danger); background: rgba(255,69,58,.1); animation: pyq-lock-in .3s ease; }
.pyq-option-wrong .pyq-option-letter { background: var(--danger); color: #fff; }
.pyq-option-wrong .pyq-option-mark { color: var(--danger); }

/* ── "CHECKING" PROGRESS BAR ──────────────────────────────────────────────
   The instant an option is tapped, a bar sweeps across the bottom of it while
   grading is in flight, so the tap always produces something visible rather
   than a dead pause waiting on the network.

   It fills fast to ~70% then eases toward 92% and stops — deliberately never
   reaching 100%. We can't know how long the round trip will take, and a bar
   that sits full while nothing happens reads as frozen. Stalling just short
   of the end reads as "still working". The card rerenders on response, which
   removes the bar outright. */
.pyq-option-checking {
  border-color: var(--primary);
  background: rgba(78,95,192,.08);
  position: relative;
  overflow: hidden;
}
.pyq-option-checking::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  height: 3px; width: 0;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
  animation: pyq-fill 1.6s cubic-bezier(.15,.85,.25,1) forwards;
}

/* Same treatment on the numerical Submit button while it reads "Checking…" */
.pyq-submit-btn.is-checking { position: relative; overflow: hidden; }
.pyq-submit-btn.is-checking::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  height: 3px; width: 0;
  background: rgba(255,255,255,.85);
  border-radius: 0 3px 3px 0;
  animation: pyq-fill 1.6s cubic-bezier(.15,.85,.25,1) forwards;
}

@keyframes pyq-fill {
  0%   { width: 0; }
  55%  { width: 70%; }
  100% { width: 92%; }
}
@keyframes pyq-lock-in {
  0%   { transform: scale(.98); }
  60%  { transform: scale(1.01); }
  100% { transform: scale(1); }
}
@keyframes pyq-pulse {
  0%, 100% { background: rgba(78,95,192,.06); }
  50%      { background: rgba(78,95,192,.14); }
}

/* Motion-sensitive users get a static filled bar instead of a sweep — still
   a clear "working" signal, no animation. */
@media (prefers-reduced-motion: reduce) {
  .pyq-option-checking::after,
  .pyq-submit-btn.is-checking::after { animation: none; width: 92%; }
}

/* ── NUMERICAL INPUT ── */
.pyq-numeric-row { display: flex; gap: 10px; }
.pyq-numeric-input {
  flex: 1; background: var(--elevated); border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; font-size: 14px; color: var(--text); font-family: var(--font); outline: none;
  transition: border-color .18s, background .18s;
}
.pyq-numeric-input:focus { border-color: var(--primary); }
.pyq-numeric-input.is-checking { border-color: var(--primary); animation: pyq-pulse 1s ease-in-out infinite; }
.pyq-numeric-input.is-correct { border-color: var(--success); background: rgba(48,209,88,.1); color: var(--success); font-weight: 700; }
.pyq-numeric-input.is-wrong   { border-color: var(--danger);  background: rgba(255,69,58,.1);  color: var(--danger);  font-weight: 700; }
.pyq-submit-btn {
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 0 22px; font-size: 14px; font-weight: 700; cursor: pointer; transition: background .15s;
}
.pyq-submit-btn:hover { background: var(--primary-hover); }
.pyq-submit-btn:disabled { opacity: .6; cursor: not-allowed; }

.pyq-correct-answer { margin-top: 8px; font-size: 12px; font-weight: 700; }
.pyq-correct-answer.is-correct { color: var(--success); }
.pyq-correct-answer.is-wrong   { color: var(--danger); }
.pyq-correct-answer.is-correct { color: var(--success); }

/* ── SOLUTION ── */
.pyq-solution {
  margin-top: 14px; background: rgba(255,255,255,.03); border-left: 2px solid var(--primary);
  border-radius: 8px; padding: 12px 14px;
}
.pyq-solution-label { font-size: 12px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.pyq-solution-text { font-size: 13px; line-height: 1.6; color: var(--text); white-space: pre-wrap; }

/* ── COMPLETION BANNER (private — only this student ever sees this) ── */
.pyq-completion-banner {
  position: fixed; inset: 0; z-index: 5000;
  background: rgba(0,0,0,.7);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.pyq-completion-inner {
  background: var(--bg-card); border: 1px solid var(--border-hi); border-radius: 18px;
  padding: 36px 30px; text-align: center; max-width: 340px; width: 100%;
}
.pyq-completion-icon { font-size: 40px; margin-bottom: 10px; }
.pyq-completion-title { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.pyq-completion-stats { font-size: 15px; color: var(--text); margin-bottom: 6px; }
.pyq-completion-percentile { font-size: 13px; color: var(--secondary); line-height: 1.5; margin-bottom: 22px; }
.pyq-completion-percentile strong { color: var(--primary); }
.pyq-completion-close {
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 11px 26px; font-size: 14px; font-weight: 700; cursor: pointer; transition: background .15s;
  font-family: var(--font);
}
.pyq-completion-close:hover { background: var(--primary-hover); }

/* ── MOBILE BOTTOM NAV (shared shell) ── */
.mobile-bottom-nav { display: none; }

@media (max-width: 640px) {
  .nav-center { display: none; }
  .main { padding: 20px 16px 90px; }
  .page-header { flex-direction: column; gap: 12px; }
  .pyq-timer { align-self: flex-start; }

  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 200;
    background: rgba(13,13,13,.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    padding: 6px 0 max(8px, env(safe-area-inset-bottom));
  }

  .mbn-item {
    flex: 1; display: flex; flex-direction: column; align-items: center; gap: 3px;
    text-decoration: none; color: var(--secondary); font-size: 10px; font-weight: 600;
    letter-spacing: .2px; padding: 4px 0; transition: color .15s; position: relative;
  }
  .mbn-item svg { stroke: currentColor; transition: stroke .15s; }
  .mbn-item.mbn-active { color: var(--primary); }
  .mbn-item.mbn-active::before {
    content: ''; position: absolute; top: -6px; left: 50%; transform: translateX(-50%);
    width: 24px; height: 2px; background: var(--primary); border-radius: 0 0 3px 3px;
  }
}