/* LakshyaOne — Error Book 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: 1100px; 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; }
.btn-log-mistake {
  display: flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 11px 20px; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: background .15s; white-space: nowrap; flex-shrink: 0;
}
.btn-log-mistake:hover { background: var(--primary-hover); }

/* ── STATS ROW ── */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-chip { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat-chip-value { font-size: 28px; font-weight: 700; letter-spacing: -1px; }
.stat-chip-label { font-size: 11px; font-weight: 600; color: var(--secondary); text-transform: uppercase; letter-spacing: .4px; margin-top: 2px; }

/* ── FILTERS ── */
.filters { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.filter-select {
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 8px 12px; font-size: 13px; outline: none; cursor: pointer;
  transition: border-color .15s;
}
.filter-select:focus { border-color: var(--border-hi); }
.filter-clear { background: none; border: 1px solid var(--border); color: var(--secondary); border-radius: var(--radius-sm); padding: 8px 14px; font-size: 13px; cursor: pointer; transition: color .15s, border-color .15s; }
.filter-clear:hover { color: var(--text); border-color: var(--border-hi); }

/* ── EMPTY STATE ── */
.empty-state { text-align: center; padding: 60px 20px; color: var(--secondary); }
.empty-state-icon { font-size: 40px; margin-bottom: 14px; }
.empty-state h2 { font-size: 17px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.empty-state p { font-size: 14px; line-height: 1.5; }

/* ── MISTAKES GRID ── */
.mistakes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }

/* ── MISTAKE CARD ── */
.mistake-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; gap: 10px; transition: border-color .15s; }
.mistake-card:hover { border-color: var(--border-hi); }
.mistake-card.resolved { opacity: .5; }

.mistake-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.mistake-subject-chapter { flex: 1; }
.mistake-subject { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--primary); margin-bottom: 3px; }
.mistake-chapter { font-size: 15px; font-weight: 600; color: var(--text); }

.mistake-type-chip {
  font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 20px; white-space: nowrap; flex-shrink: 0;
}
.type-concept    { background: rgba(217,123,123,.1);  color: var(--danger);  border: 1px solid rgba(217,123,123,.2);  }
.type-silly      { background: rgba(212,168,83,.1);  color: var(--warning); border: 1px solid rgba(212,168,83,.2); }
.type-time       { background: rgba(78,95,192,.1); color: var(--primary); border: 1px solid rgba(78,95,192,.2); }
.type-unattempted{ background: rgba(168,162,158,.1); color: var(--secondary); border: 1px solid rgba(168,162,158,.15); }

.mistake-question { font-size: 13px; color: var(--secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.mistake-notes { font-size: 12px; color: var(--text); background: rgba(255,255,255,.03); border-radius: 8px; padding: 8px 10px; line-height: 1.5; border-left: 2px solid var(--border-hi); }

.mistake-card-footer { display: flex; align-items: center; justify-content: space-between; }
.mistake-meta { display: flex; align-items: center; gap: 8px; }
.mistake-date  { font-size: 11px; color: var(--secondary); }
.mistake-mock  { font-size: 11px; color: var(--secondary); background: rgba(255,255,255,.04); border-radius: 6px; padding: 2px 7px; }

.mistake-actions { display: flex; gap: 6px; }
.btn-resolve, .btn-delete {
  background: none; border: 1px solid var(--border); border-radius: 8px; padding: 5px 10px;
  font-size: 11px; font-weight: 600; cursor: pointer; transition: background .15s, color .15s, border-color .15s;
}
.btn-resolve { color: var(--success); border-color: rgba(74,222,128,.2); }
.btn-resolve:hover { background: rgba(74,222,128,.08); }
.btn-resolve.is-resolved { color: var(--secondary); border-color: var(--border); }
.btn-delete  { color: var(--secondary); }
.btn-delete:hover  { color: var(--danger); border-color: rgba(217,123,123,.2); background: rgba(217,123,123,.06); }

/* ── LOG MODAL ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.hidden { display: none; }

.log-modal-inner {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px; width: 100%; max-width: 480px;
  display: flex; flex-direction: column; gap: 16px; max-height: 90vh; overflow-y: auto;
}
.log-modal-header { display: flex; align-items: center; justify-content: space-between; }
.log-modal-header h2 { font-size: 17px; font-weight: 700; }
.modal-close-btn { background: none; border: none; color: var(--secondary); font-size: 22px; cursor: pointer; line-height: 1; }
.modal-close-btn:hover { color: var(--text); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-label { font-size: 12px; font-weight: 600; color: var(--secondary); text-transform: uppercase; letter-spacing: .4px; }
.form-input, .form-select, .form-textarea {
  background: var(--elevated); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 10px 12px; font-size: 14px; outline: none;
  font-family: inherit; transition: border-color .15s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--border-hi); }
.form-textarea { resize: vertical; min-height: 72px; }

/* Mistake type radio buttons */
.type-options { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.type-option input { display: none; }
.type-option label {
  display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); font-size: 13px; font-weight: 500; cursor: pointer;
  transition: border-color .15s, background .15s; color: var(--secondary);
}
.type-option input:checked + label { border-color: var(--primary); background: rgba(78,95,192,.08); color: var(--text); }

.btn-save-mistake {
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 13px; font-size: 15px; font-weight: 700; cursor: pointer; margin-top: 4px;
  transition: background .15s;
}
.btn-save-mistake:hover { background: var(--primary-hover); }
.btn-save-mistake:disabled { opacity: .5; cursor: not-allowed; }

/* Toast */
.eb-toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--elevated); border: 1px solid var(--border-hi); color: var(--text);
  border-radius: 12px; padding: 12px 20px; font-size: 14px; font-weight: 500;
  z-index: 9999; opacity: 0; transition: opacity .3s, transform .3s;
  white-space: nowrap;
}
.eb-toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── MOBILE BOTTOM NAV ── */

.mobile-bottom-nav {
  display: none;
}

@media (max-width: 640px) {
  /* Desktop nav links: hide */
  .nav-center { display: none; }

  /* Main: bottom padding for nav */
  .main { padding: 20px 16px 90px; }

  /* Page header: stack */
  .page-header { flex-direction: column; gap: 12px; }
  .btn-log-mistake { width: 100%; justify-content: center; }

  /* Stats: 2 columns */
  .stats-row { grid-template-columns: 1fr 1fr; }

  /* Cards: always 1 column */
  .mistakes-grid { grid-template-columns: 1fr; }

  /* Form: 1 column */
  .form-row { grid-template-columns: 1fr; }

  /* Modal → bottom sheet */
  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }
  .log-modal-inner {
    border-radius: 16px 16px 0 0;
    max-width: 100%;
    width: 100%;
    padding-bottom: max(24px, env(safe-area-inset-bottom));
    max-height: 88vh;
  }

  /* Toast: above bottom nav */
  .eb-toast { bottom: 76px; }

  /* Mobile bottom nav */
  .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;
  }

  /* Push page above the tab bar */
  body { padding-bottom: calc(68px + env(safe-area-inset-bottom)); }
}

@media (max-width: 400px) {
  .type-options { grid-template-columns: 1fr; }
}