/* DESIGN SYSTEM TOKENS */
:root {
  --primary: #1e2fc9;
  --primary-dark: #152296;
  --primary-light: #e8eaff;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --bg-main: #f8fafc;
  --surface: #ffffff;
  --border-color: #e2e8f0;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --text-disabled: #94a3b8;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 4px 12px rgba(30, 47, 201, 0.06);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-main);
  color: var(--text-dark);
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

.hidden { display: none !important; }

/* AUTHENTICATION SCREEN */
.auth-container {
  position: fixed;
  inset: 0;
  background: var(--bg-main);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.auth-card {
  background: var(--surface);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-color);
  text-align: center;
  max-width: 380px;
  width: 100%;
}

.brand-badge {
  width: 60px;
  height: 60px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.auth-card h2 { font-size: 1.3rem; margin-bottom: 8px; color: var(--text-dark); }
.auth-card p { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 24px; line-height: 1.45; }

/* APP LAYOUT */
.app-container {
  width: 100%;
  max-width: 480px;
  padding: 16px;
  padding-bottom: 90px;
  position: relative;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.user-profile { display: flex; align-items: center; gap: 12px; }
.avatar { width: 44px; height: 44px; border-radius: 50%; border: 2px solid var(--primary-light); object-fit: cover; }
.greeting { font-size: 0.725rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.user-profile h1 { font-size: 1.15rem; font-weight: 700; color: var(--text-dark); }

.header-actions { display: flex; align-items: center; gap: 10px; }
.sync-badge {
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 700;
  background: var(--border-color);
  color: var(--text-muted);
}
.sync-badge.online { background: var(--success-light); color: var(--success); }

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
}

/* WEEKS SECTION (CIRCLE CHIPS) */
.weeks-section { margin-bottom: 20px; }
.section-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; margin-bottom: 10px; letter-spacing: 0.5px; }

.days-chip-container {
  display: flex;
  justify-content: space-between;
  gap: 6px;
}

.day-chip {
  flex: 1;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--surface);
  color: var(--text-dark);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.day-chip.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(30, 47, 201, 0.35);
}

/* DASHBOARD SUMMARY RECTANGULAR BOX */
.dashboard-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
}

.progress-left { width: 84px; height: 84px; flex-shrink: 0; }
.circular-progress { position: relative; width: 100%; height: 100%; }
.circular-chart { display: block; width: 100%; height: 100%; }
.circle-bg { fill: none; stroke: var(--border-color); stroke-width: 3.8; }
.circle { fill: none; stroke: var(--success); stroke-width: 3.8; stroke-linecap: round; transition: stroke-dasharray 0.4s ease; }
.circle-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-dark);
}

.metrics-right { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.metric-row { display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; }
.metric-label { color: var(--text-muted); font-weight: 500; }
.metric-value { font-weight: 700; }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }

/* SEGMENTED CONTROL SWITCH */
.segmented-control {
  display: flex;
  background: #e2e8f0;
  padding: 4px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.segment-btn {
  flex: 1;
  padding: 10px 4px;
  border: none;
  background: transparent;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.segment-btn.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

/* LIST CARDS */
.task-list { display: flex; flex-direction: column; gap: 12px; }
.group-header { font-size: 0.75rem; font-weight: 800; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.mt-20 { margin-top: 20px; }

.task-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.task-content { flex: 1; }
.task-title { font-size: 0.95rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.task-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.4; white-space: pre-line; }

/* RADIO CHECKBOX */
.task-checkbox {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  cursor: pointer;
  appearance: none;
  display: grid;
  place-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  margin-top: 2px;
}

.task-checkbox:checked {
  background-color: var(--success);
  border-color: var(--success);
}

.task-checkbox:checked::before {
  content: "";
  width: 10px;
  height: 6px;
  border-left: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(-45deg) translate(1px, -1px);
}

/* GRAYED OUT COMPLETED CARDS */
.task-card.completed {
  background: #f1f5f9;
  border-color: #cbd5e1;
}
.task-card.completed .task-title { text-decoration: line-through; color: var(--text-disabled); }
.task-card.completed .task-desc { color: var(--text-disabled); }

/* EXPANDABLE INLINE EDITING CARD */
.task-card.editable { cursor: pointer; }
.task-card.expanded {
  flex-direction: column;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.edit-fields { width: 100%; display: flex; flex-direction: column; gap: 10px; margin-top: 10px; }
.edit-input, .edit-textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-dark);
}

.edit-actions { display: flex; justify-content: flex-end; width: 100%; margin-top: 10px; }

/* EMPTY STATE */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-muted);
  font-size: 0.925rem;
  font-weight: 500;
}

.mt-12 { margin-top: 12px; }

.btn-secondary {
  background: var(--primary-light);
  color: var(--primary);
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
}

/* FAB BUTTON */
.fab-btn {
  position: fixed;
  bottom: 24px;
  right: calc(50% - 210px);
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  box-shadow: 0 8px 20px rgba(30, 47, 201, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (max-width: 480px) {
  .fab-btn { right: 20px; }
}

.fab-btn:active { transform: scale(0.92); }

/* MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 2000;
}

.modal-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 400px;
  padding: 24px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.close-btn { background: none; border: none; font-size: 1.6rem; color: var(--text-muted); cursor: pointer; }

.form-group { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.8rem; font-weight: 700; color: var(--text-muted); }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-dark);
}

.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }
.btn-flat { background: transparent; border: none; color: var(--text-muted); padding: 10px 14px; cursor: pointer; font-weight: 700; }