@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,300&family=DM+Mono:wght@300;400;500&display=swap');

/* ── Variables ─────────────────────────────────────────── */
:root {
  /* Warm neutral palette — not cold, not dark, not paper */
  --bg:          #f2ede8;
  --bg2:         #faf8f5;
  --bg3:         #eae4dd;
  --bg4:         #ddd6cc;
  --border:      #ccc4b8;
  --border2:     #b8afa2;

  --text:        #1c1916;
  --text2:       #6b6056;
  --text3:       #a09488;

  /* Accent — terracotta/sienna, warm and decisive */
  --accent:      #c4622d;
  --accent2:     #a34e22;
  --accent-dim:  rgba(196,98,45,0.10);

  --red:         #b83232;
  --green:       #2e7d52;
  --green-light: #3a9e68;
  --blue:        #2d5fa3;

  /* Day state colors */
  --day-reading:  rgba(196,98,45,0.08);
  --day-done:     rgba(46,125,82,0.10);
  --day-off:      rgba(160,148,136,0.06);

  --sans:   'DM Sans', system-ui, sans-serif;
  --mono:   'DM Mono', 'Fira Mono', monospace;

  --radius:  3px;
  --radius2: 6px;
  --shadow:  0 1px 8px rgba(0,0,0,0.08);
  --t:       0.15s ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; -webkit-font-smoothing: antialiased; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.55;
  min-height: 100vh;
}

/* ── PIN Screen ─────────────────────────────────────────── */
#pin-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 1000; gap: 2rem;
}
.pin-title {
  font-family: var(--sans);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.pin-subtitle {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: -1.5rem;
}
.pin-dots { display: flex; gap: 0.6rem; }
.pin-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--border2);
  background: transparent;
  transition: all var(--t);
}
.pin-dot.filled { background: var(--accent); border-color: var(--accent); }
.pin-keypad {
  display: grid;
  grid-template-columns: repeat(3, 60px);
  gap: 0.6rem;
}
.pin-key {
  height: 60px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t);
  display: flex; align-items: center; justify-content: center;
}
.pin-key:hover { background: var(--bg3); border-color: var(--border2); }
.pin-key:active { background: var(--accent-dim); border-color: var(--accent); }
.pin-key.del { color: var(--text2); }
.pin-error {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--red);
  height: 1rem;
  letter-spacing: 0.04em;
}

/* ── App Shell ──────────────────────────────────────────── */
#app { display: none; min-height: 100vh; flex-direction: column; }
#app.visible { display: flex; }

/* ── Header ─────────────────────────────────────────────── */
header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 52px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
}
.app-logo {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.app-logo span {
  color: var(--accent);
  font-weight: 400;
  margin-left: 0.15rem;
}
.header-right { display: flex; gap: 0.35rem; }
.icon-btn {
  width: 32px; height: 32px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text3);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  transition: all var(--t);
}
.icon-btn:hover { background: var(--bg3); border-color: var(--border); color: var(--text); }
.icon-btn.active { color: var(--accent); }

/* ── Navigation ─────────────────────────────────────────── */
nav {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  display: flex; gap: 0;
  overflow-x: auto;
}
nav::-webkit-scrollbar { display: none; }
.nav-item {
  padding: 0.65rem 1rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--t);
  white-space: nowrap;
  user-select: none;
}
.nav-item:hover { color: var(--text2); }
.nav-item.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Main ───────────────────────────────────────────────── */
main {
  flex: 1;
  padding: 1.75rem 1.5rem;
  max-width: 860px;
  width: 100%; margin: 0 auto;
}

/* ── Typography ─────────────────────────────────────────── */
.page-title {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 0.2rem;
  line-height: 1.2;
}
.page-subtitle {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  padding: 1.25rem;
  margin-bottom: 0.875rem;
}
.card-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 1rem;
}
.card-title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.35;
}
.card-meta {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.15rem;
}

/* ── Today Card ──────────────────────────────────────────── */
.today-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  padding: 1.5rem;
  margin-bottom: 0.875rem;
  position: relative;
  overflow: hidden;
}
.today-card::before {
  content: '';
  position: absolute; top: 0; left: 0; width: 3px; bottom: 0;
  background: var(--accent);
  border-radius: 0;
}
.today-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.today-book-title {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.2rem;
  line-height: 1.25;
}
.today-book-author {
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 1.25rem;
}
.pages-target {
  display: flex; align-items: baseline; gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.pages-number {
  font-family: var(--mono);
  font-size: 2.75rem;
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}
.pages-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text3);
  letter-spacing: 0.05em;
  line-height: 1.5;
}

/* ── Progress Bar ────────────────────────────────────────── */
.progress-bar {
  height: 3px;
  background: var(--bg4);
  border-radius: 2px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
}
.progress-labels {
  display: flex; justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.63rem;
  color: var(--text3);
  margin-bottom: 1.25rem;
  letter-spacing: 0.04em;
}

/* ── Week Grid ───────────────────────────────────────────── */
.week-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.week-day {
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  padding: 0.6rem 0.35rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--t);
  background: var(--bg2);
}
.week-day:hover { border-color: var(--border2); background: var(--bg3); }

/* Reading day — warm tinted */
.week-day.has-reading {
  background: var(--day-reading);
  border-color: rgba(196,98,45,0.25);
}
.week-day.has-reading:hover {
  border-color: var(--accent);
}

/* Completed day — green tinted */
.week-day.done {
  background: var(--day-done);
  border-color: rgba(46,125,82,0.3);
}

/* Rest/off day - crosshatched pattern to clearly signal off */
.week-day.no-reading {
  background: repeating-linear-gradient(
    45deg,
    var(--bg3),
    var(--bg3) 3px,
    var(--bg4) 3px,
    var(--bg4) 6px
  );
  border-color: var(--border);
  cursor: default !important;
}
.week-day.no-reading .week-day-name { color: var(--text3); opacity: 0.6; }
.week-day.no-reading .week-day-pages { color: var(--text3); font-size: 0.7rem; opacity: 0.5; }

/* Partial — read but not complete */
.week-day.partial {
  background: rgba(196,98,45,0.07);
  border-color: rgba(196,98,45,0.4);
}
/* Missed — past day with no log */
.week-day.missed {
  background: rgba(184,50,50,0.07);
  border-color: rgba(184,50,50,0.35);
}

/* Today */
.week-day.today {
  border-color: var(--accent);
  border-width: 2px;
}

.week-day-name {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 0.2rem;
}
.week-day-pages {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.2;
}
.week-day.today .week-day-pages { color: var(--accent); }
.week-day.done .week-day-pages { color: var(--green); }
.week-day.no-reading .week-day-pages { color: var(--text3); font-size: 0.75rem; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--t);
  border: 1px solid transparent;
  font-weight: 400;
}
.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent2); border-color: var(--accent2); }
.btn-secondary {
  background: transparent;
  color: var(--text2);
  border-color: var(--border2);
}
.btn-secondary:hover { background: var(--bg3); color: var(--text); }
.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: var(--red);
}
.btn-danger:hover { background: var(--red); color: white; }
.btn-sm { padding: 0.35rem 0.8rem; font-size: 0.63rem; }

/* ── Inputs ──────────────────────────────────────────────── */
.form-group { margin-bottom: 1.1rem; }
label {
  display: block;
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 0.35rem;
}
input, select, textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.88rem;
  padding: 0.55rem 0.8rem;
  transition: border-color var(--t);
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); background: var(--bg2); }
input::placeholder { color: var(--text3); }
select option { background: var(--bg3); }

/* ── Tags ────────────────────────────────────────────────── */
.tag {
  display: inline-flex;
  padding: 0.18rem 0.55rem;
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(196,98,45,0.3);
}
.tag.green { background: rgba(46,125,82,0.1); color: var(--green); border-color: rgba(46,125,82,0.3); }
.tag.gray { background: var(--bg3); color: var(--text3); border-color: var(--border); }
.tag.red { background: rgba(184,50,50,0.1); color: var(--red); border-color: rgba(184,50,50,0.3); }

/* ── Book List Item ──────────────────────────────────────── */
.book-item {
  display: flex; align-items: flex-start; gap: 0.875rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--border);
}
.book-item:last-child { border-bottom: none; }
.book-cover {
  width: 40px; height: 56px;
  background: var(--bg3);
  border-radius: 2px;
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--border);
}
.book-cover img { width: 100%; height: 100%; object-fit: cover; }
.book-info { flex: 1; min-width: 0; }
.book-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.15rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.book-author { font-size: 0.75rem; color: var(--text2); margin-bottom: 0.35rem; }
.book-tags { display: flex; gap: 0.3rem; flex-wrap: wrap; }
.book-right {
  display: flex; flex-direction: column; align-items: flex-end; gap: 0.3rem;
  flex-shrink: 0;
}
.book-pages { font-family: var(--mono); font-size: 0.68rem; color: var(--text3); }

/* ── Year Book ───────────────────────────────────────────── */
.year-book {
  display: flex; gap: 0.875rem; align-items: flex-start;
  padding: 1rem 0; border-bottom: 1px solid var(--border);
}
.year-book:last-child { border-bottom: none; }
.year-book-pos {
  font-family: var(--mono); font-size: 0.65rem;
  color: var(--text3); width: 1.5rem; padding-top: 0.2rem;
  text-align: center; flex-shrink: 0;
}
.year-book-bar { flex: 1; }
.year-book-dates {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text3);
  margin-top: 0.4rem;
  letter-spacing: 0.02em;
}

/* ── Stats Grid ──────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  padding: 1.1rem;
  text-align: center;
}
.stat-number {
  font-family: var(--mono);
  font-size: 1.85rem;
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.35rem;
  letter-spacing: -0.03em;
}
.stat-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
}

/* ── Modal ───────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(28,25,22,0.5);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
}
.modal {
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius2);
  width: 100%; max-width: 500px;
  max-height: 90vh; overflow-y: auto;
  padding: 1.75rem;
  box-shadow: 0 4px 32px rgba(0,0,0,0.15);
}
.modal-title {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  color: var(--text);
}
.modal-actions {
  display: flex; gap: 0.6rem; justify-content: flex-end;
  margin-top: 1.25rem;
}

/* ── Notification ────────────────────────────────────────── */
.notification {
  position: fixed; bottom: 1.25rem; right: 1.25rem;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius2);
  padding: 0.875rem 1.1rem;
  max-width: 320px; z-index: 300;
  box-shadow: var(--shadow);
  animation: slideIn 0.15s ease;
}
.notification.error { border-color: var(--red); }
.notification.success { border-color: var(--green); }
.notification.warning { border-color: var(--accent); }
@keyframes slideIn {
  from { transform: translateX(12px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
.notif-title {
  font-family: var(--mono); font-size: 0.65rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text3); margin-bottom: 0.2rem;
}
.notif-msg { font-size: 0.82rem; color: var(--text); }

/* ── Search ──────────────────────────────────────────────── */
.search-bar { position: relative; margin-bottom: 1.25rem; }
.search-bar input { padding-left: 2.25rem; }
.search-icon {
  position: absolute; left: 0.7rem; top: 50%;
  transform: translateY(-50%); color: var(--text3); font-size: 0.85rem;
}

/* ── Filter Pills ────────────────────────────────────────── */
.filter-pills { display: flex; gap: 0.35rem; flex-wrap: wrap; margin-bottom: 1.1rem; }
.pill {
  padding: 0.28rem 0.7rem;
  border-radius: 99px;
  font-family: var(--mono);
  font-size: 0.62rem; letter-spacing: 0.07em; text-transform: uppercase;
  cursor: pointer; border: 1px solid var(--border);
  color: var(--text3); background: transparent; transition: all var(--t);
}
.pill:hover { border-color: var(--border2); color: var(--text2); }
.pill.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* ── Loading ─────────────────────────────────────────────── */
.loading {
  display: flex; align-items: center; justify-content: center;
  padding: 3rem; color: var(--text3);
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em;
}
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  margin-right: 0.65rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Empty State ─────────────────────────────────────────── */
.empty { text-align: center; padding: 3rem 1rem; color: var(--text3); }
.empty-icon { font-size: 2rem; margin-bottom: 0.875rem; opacity: 0.35; }
.empty-text { font-size: 0.9rem; color: var(--text2); }

/* ── Divider ─────────────────────────────────────────────── */
.divider { height: 1px; background: var(--border); margin: 1.25rem 0; }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── Mobile ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  main { padding: 1.25rem 0.875rem; }
  header, nav { padding-left: 0.875rem; padding-right: 0.875rem; }
  .week-grid { gap: 0.25rem; }
  .week-day { padding: 0.5rem 0.2rem; }
  .week-day-pages { font-size: 0.85rem; }
  .today-book-title { font-size: 1.15rem; }
  .pages-number { font-size: 2.25rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .modal { padding: 1.25rem; }
}