@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@400;500;600;700&family=JetBrains+Mono:wght@500;600&display=swap');

:root {
  --bg-page: #0E1420;
  --bg-card: #141C2B;
  --bg-elevated: #1A2333;
  --bg-input: #0E1420;
  --border: #1E293B;
  --text-primary: #F1F5F9;
  --text-muted: #64748B;
  --text-faint: #475569;
  --accent: #2DD4BF;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --accent-text: #0B1120;
  --gold: #D4A94F;
  --danger: #F87171;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Hind Siliguri', sans-serif;
  background: var(--bg-page);
  min-height: 100vh;
  color: var(--text-primary);
}

.mono { font-family: 'JetBrains Mono', monospace; }

/* ============ LOGIN ============ */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-cover {
  position: relative;
  width: 100%;
  max-width: 380px;
}
.login-cover .stitch-line { display: none; }
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 44px 32px;
  text-align: center;
}
.login-emblem {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--bg-elevated);
  color: var(--accent);
  font-weight: 600;
  font-size: 22px;
  margin-bottom: 16px;
}
.login-card h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--text-primary);
}
.login-sub {
  color: var(--text-muted);
  font-size: 13.5px;
  margin: 0 0 28px;
}
.login-form { display: flex; flex-direction: column; gap: 12px; }
.login-form input {
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 15px;
  background: var(--bg-input);
  color: var(--text-primary);
}
.login-form input:focus { outline: none; border-color: var(--accent); }
.login-form button {
  padding: 13px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.login-form button:hover { opacity: 0.88; }
.login-error { color: var(--danger); font-size: 13px; margin-top: 14px; }

/* ============ NOTEBOOK SHELL ============ */
.notebook {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--bg-page);
  padding-left: 0;
}
.stitch-line { display: none; }

.notebook-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.header-left { display: flex; align-items: center; gap: 12px; }
.cover-emblem {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--bg-elevated);
  color: var(--accent);
  font-weight: 600;
  font-size: 17px;
  flex-shrink: 0;
}
.notebook-header h1 {
  font-size: 19px;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}
.tagline { margin: 2px 0 0; font-size: 12px; color: var(--text-muted); }
.logout-link {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: 20px;
  white-space: nowrap;
}
.logout-link:hover { border-color: var(--danger); color: var(--danger); }

/* ============ TABS ============ */
.tabs {
  display: flex;
  padding: 14px 20px 0;
  gap: 8px;
}
.tab-btn {
  flex: 1;
  padding: 11px 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-family: 'Hind Siliguri', sans-serif;
  font-weight: 600;
  font-size: 14.5px;
  cursor: pointer;
  border-radius: 8px;
}
.tab-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.page { padding: 20px 20px 60px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============ MONTH BAR / TOTAL ============ */
.month-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 16px;
}
.nav-arrow {
  border: 1px solid var(--border);
  background: var(--bg-card);
  width: 34px; height: 34px;
  border-radius: 9px;
  cursor: pointer;
  font-size: 15px;
  color: var(--text-primary);
}
.nav-arrow:hover { border-color: var(--accent); color: var(--accent); }
.month-label { font-weight: 600; font-size: 16px; min-width: 140px; text-align: center; color: var(--text-primary); }

.total-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
}
.total-label { font-size: 12.5px; color: var(--text-muted); letter-spacing: 0.2px; }
.total-amount { font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 30px; margin-top: 6px; color: var(--text-primary); }

/* ============ FORMS ============ */
.entry-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 20px;
}
.form-row { display: flex; gap: 10px; margin-bottom: 10px; }
.form-row input, .form-row select {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 14.5px;
  background: var(--bg-input);
  color: var(--text-primary);
}
.form-row input:focus, .form-row select:focus { outline: none; border-color: var(--accent); }
.add-btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.add-btn:hover { opacity: 0.88; }

/* ============ LEDGER LIST ============ */
.ledger-list { list-style: none; margin: 0; padding: 0; }
.ledger-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--border);
}

.entry-main { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.entry-cat { font-weight: 600; font-size: 14.5px; color: var(--text-primary); }
.entry-note { font-size: 12.5px; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entry-date { font-size: 11.5px; color: var(--gold); }

.entry-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.entry-amount { font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 16px; color: var(--text-primary); }
.del-btn {
  border: none;
  background: transparent;
  color: var(--text-faint);
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}
.del-btn:hover { color: var(--danger); }

.empty-msg { text-align: center; color: var(--text-muted); font-size: 14px; padding: 30px 0; }

/* ============ SUBTABS (todo/routine) ============ */
.subtabs { display: flex; gap: 8px; margin-bottom: 16px; }
.subtab-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 20px;
  font-size: 13.5px;
  color: var(--text-muted);
  cursor: pointer;
}
.subtab-btn.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.todo-check {
  width: 20px; height: 20px;
  border: 1.5px solid var(--text-faint);
  border-radius: 6px;
  flex-shrink: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--accent-text);
  font-size: 12px;
}
.todo-check.checked { background: var(--accent); border-color: var(--accent); }
.todo-title { font-size: 14.5px; color: var(--text-primary); }
.todo-title.done { text-decoration: line-through; color: var(--text-faint); }
.todo-left { display: flex; align-items: center; gap: 12px; min-width: 0; }

/* ============ RESPONSIVE ============ */
@media (max-width: 480px) {
  .notebook-header { padding: 16px 14px 12px; }
  .page { padding: 16px 14px 50px; }
  .form-row { flex-direction: column; }
  .total-amount { font-size: 26px; }
}