:root {
  --bg: #0f172a;
  --sidebar: #111827;
  --card: #1f2937;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --text: #f9fafb;
  --muted: #9ca3af;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 14px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: var(--text);
  height: 100vh;
}

.app-container {
  display: flex;
  height: 100vh;
}

/* Sidebar */

.sidebar {
  width: 260px;
  background: var(--sidebar);
  padding: 30px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid rgba(255,255,255,0.05);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-circle {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 15px var(--accent);
}

.nav {
  margin-top: 50px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 12px 15px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: 0.3s ease;
  text-align: left;
  font-weight: 500;
}

.nav-btn:hover {
  background: rgba(99,102,241,0.1);
  color: var(--accent-hover);
  transform: translateX(6px);
}

.nav-btn.active {
  background: rgba(99,102,241,0.15);
  color: var(--accent);
}

.profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
}

.name {
  font-weight: 600;
}

.status {
  font-size: 13px;
  color: var(--muted);
}

/* Main */

.main {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
}

/* Centered Header */

.centered-header {
  text-align: center;
  margin-bottom: 40px;
}

.centered-header h1 {
  font-size: 32px;
  font-weight: 800;
}

.centered-header p {
  margin-top: 8px;
  color: var(--muted);
}

/* Task Input */

.task-input {
  margin-top: 30px;
  display: flex;
  gap: 15px;
}

.task-input input {
  flex: 1;
  padding: 14px;
  border-radius: var(--radius);
  border: none;
  background: var(--card);
  color: var(--text);
  outline: none;
  transition: 0.2s ease;
}

.task-input input:focus {
  box-shadow: 0 0 0 2px var(--accent);
}

.task-input button {
  padding: 14px 22px;
  border-radius: var(--radius);
  border: none;
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s ease;
  box-shadow: 0 8px 20px rgba(99,102,241,0.3);
}

.task-input button:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 25px rgba(99,102,241,0.5);
}

.task-input button:active {
  transform: scale(0.97);
}

/* Task List */

.task-list {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.task-card {
  background: var(--card);
  padding: 18px 22px;
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: 0.3s ease;
  border: 1px solid transparent;
}

.task-card:hover {
  transform: translateY(-4px);
  border: 1px solid rgba(99,102,241,0.4);
  box-shadow: 0 15px 30px rgba(0,0,0,0.4);
}

.task-info {
  display: flex;
  align-items: center;
  gap: 18px;
}

.task-info h3 {
  font-size: 16px;
  font-weight: 600;
}

.task-info p {
  font-size: 13px;
  color: var(--muted);
}

/* Custom Checkbox */

.task-check {
  appearance: none;
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 8px;
  border: 2px solid rgba(99,102,241,0.5);
  background: rgba(99,102,241,0.08);
  cursor: pointer;
  position: relative;
  transition: all 0.25s ease;
  display: grid;
  place-content: center;
}

.task-check:hover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.18);
  box-shadow: 0 0 12px rgba(99,102,241,0.45);
}

.task-check:checked {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 8px 20px rgba(99,102,241,0.5);
}

.task-check:checked::after {
  content: "✓";
  color: white;
  font-size: 15px;
  font-weight: 700;
}

/* Completed State */

.completed {
  opacity: 0.6;
  text-decoration: line-through;
}

/* Task Actions */

.task-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.task-color {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(255,255,255,0.2);
  position: relative;
  top: 2px;
}

.task-actions button {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: none;
  background: rgba(99,102,241,0.15);
  color: var(--accent);
  font-weight: 700;
  cursor: pointer;
  transition: 0.25s ease;
}

.task-actions button:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(99,102,241,0.4);
}

.task-actions button:active {
  transform: scale(0.95);
}

.remove-task {
  background: rgba(239,68,68,0.15) !important;
  color: var(--danger) !important;
}

.remove-task:hover {
  background: var(--danger) !important;
  color: white !important;
  box-shadow: 0 8px 15px rgba(239,68,68,0.4) !important;
}

/* Hide filtered cards */

.is-hidden {
  display: none;
}

/* Scheduled time text */

.task-time {
  font-size: 13px;
  color: var(--accent);
  margin-top: 4px;
}

/* Empty state */

.empty-state {
  display: none;
  margin-top: 22px;
  justify-content: center;
}

.empty-state.show {
  display: flex;
}

.empty-card {
  width: min(520px, 100%);
  background: rgba(31,41,55,0.65);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-align: center;
  box-shadow: 0 18px 35px rgba(0,0,0,0.35);
}

.empty-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  margin: 0 auto 10px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(99,102,241,0.6);
}

.empty-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.empty-card p {
  font-size: 13px;
  color: var(--muted);
}

/* ================= MODAL ================= */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.85);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: 0.25s ease;
  z-index: 1000;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--card);
  padding: 30px;
  border-radius: var(--radius);
  width: 440px;
  text-align: center;
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from { transform: translateY(15px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal h2 {
  margin-bottom: 10px;
}

.modal p {
  color: var(--muted);
  margin-bottom: 20px;
}

.modal-options {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-btn {
  padding: 12px 14px;
  border-radius: var(--radius);
  border: none;
  background: rgba(99,102,241,0.15);
  color: var(--accent);
  cursor: pointer;
  font-weight: 600;
  transition: 0.25s ease;
}

.modal-btn:hover {
  background: var(--accent);
  color: white;
  box-shadow: 0 10px 20px rgba(99,102,241,0.4);
  transform: translateY(-2px);
}

.modal-btn:active {
  transform: scale(0.98);
}

.modal-btn.accent {
  background: var(--accent);
  color: white;
}

.modal-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.schedule-row {
  display: grid;
  grid-template-columns: 1fr 130px;
  gap: 12px;
}

.chosen-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(17,24,39,0.55);
}

.chosen-preview .preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(99,102,241,0.35);
  box-shadow: 0 0 12px rgba(99,102,241,0.35);
}

.chosen-preview.has-value .preview-dot {
  background: var(--accent);
  box-shadow: 0 0 18px rgba(99,102,241,0.6);
}

.chosen-preview .preview-text {
  color: var(--muted);
  font-size: 13px;
}

.chosen-preview.has-value .preview-text {
  color: var(--text);
}

.modal-close {
  margin-top: 18px;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  transition: 0.2s ease;
}

.modal-close:hover {
  color: var(--text);
}

/* ================= PICKER POPUP ================= */

.picker-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.78);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: 0.2s ease;
  z-index: 1100;
}

.picker-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.picker {
  width: 720px;
  max-width: calc(100% - 30px);
  background: rgba(31,41,55,0.92);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  box-shadow: 0 30px 70px rgba(0,0,0,0.55);
  overflow: hidden;
  animation: pickerIn 0.22s ease;
}

@keyframes pickerIn {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.picker-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  background: rgba(17,24,39,0.55);
}

.picker-title {
  text-align: left;
}

.picker-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(99,102,241,0.16);
  color: var(--accent);
  font-weight: 700;
  font-size: 12px;
  margin-bottom: 6px;
}

.picker-subtitle {
  color: var(--muted);
  font-size: 13px;
}

.picker-x {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: none;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor: pointer;
  transition: 0.2s ease;
}

.picker-x:hover {
  background: rgba(99,102,241,0.2);
  color: white;
}

.picker-body {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 0;
}

.cal {
  padding: 18px;
}

.cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.cal-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor: pointer;
  transition: 0.2s ease;
}

.cal-btn:hover {
  background: rgba(99,102,241,0.22);
}

.cal-month {
  font-weight: 800;
  letter-spacing: 0.2px;
}

.cal-dow {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  padding: 6px 0 10px;
  color: var(--muted);
  font-size: 12px;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.cal-day {
  height: 42px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(17,24,39,0.45);
  color: var(--text);
  cursor: pointer;
  transition: 0.18s ease;
  font-weight: 700;
}

.cal-day:hover {
  border-color: rgba(99,102,241,0.55);
  box-shadow: 0 12px 22px rgba(0,0,0,0.25);
  transform: translateY(-1px);
}

.cal-day.ghost {
  background: transparent;
  border-color: transparent;
  cursor: default;
}

.cal-day.today {
  border-color: rgba(99,102,241,0.35);
  background: rgba(99,102,241,0.10);
}

.cal-day.selected {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 14px 26px rgba(99,102,241,0.45);
}

.time {
  padding: 18px;
  border-left: 1px solid rgba(255,255,255,0.07);
  background: rgba(17,24,39,0.45);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.time-label {
  text-align: left;
  font-weight: 800;
}

.time-select {
  position: relative;
}

.time-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(31,41,55,0.65);
  color: var(--text);
  cursor: pointer;
  transition: 0.2s ease;
  font-weight: 700;
}

.time-btn:hover {
  border-color: rgba(99,102,241,0.55);
  box-shadow: 0 14px 25px rgba(0,0,0,0.25);
  transform: translateY(-1px);
}

.time-caret {
  color: rgba(255,255,255,0.65);
}

.time-menu {
  position: absolute;
  top: 52px;
  left: 0;
  right: 0;
  max-height: 240px;
  overflow: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(31,41,55,0.95);
  box-shadow: 0 20px 40px rgba(0,0,0,0.45);
  padding: 8px;
  display: none;
  z-index: 1200;
}

.time-menu.open {
  display: block;
}

.time-item {
  width: 100%;
  padding: 10px 10px;
  border-radius: 12px;
  border: none;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: 0.18s ease;
  font-weight: 700;
}

.time-item:hover {
  background: rgba(99,102,241,0.16);
  color: white;
}

.time-item.selected {
  background: rgba(99,102,241,0.26);
  border: 1px solid rgba(99,102,241,0.45);
}

.picker-summary {
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(15,23,42,0.35);
}

.sum-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(99,102,241,0.55);
}

.sum-text {
  color: var(--muted);
  font-size: 13px;
  text-align: left;
}

.picker-done {
  margin-top: auto;
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: none;
  background: var(--accent);
  color: white;
  font-weight: 800;
  cursor: pointer;
  transition: 0.2s ease;
  box-shadow: 0 12px 25px rgba(99,102,241,0.35);
}

.picker-done:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 18px 32px rgba(99,102,241,0.45);
}

.picker-done:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}