/* ===========================
   CSS Custom Properties
=========================== */
:root {
  --primary: #e85d4a;
  --primary-light: #ff8a7a;
  --primary-dark: #b5311e;
  --primary-surface: #fdf3f2;
  --primary-container: #fce4e1;

  --secondary: #6b7a8d;
  --on-secondary: #ffffff;

  --surface: #ffffff;
  --surface-variant: #f8f4f4;
  --on-surface: #1c1b1b;
  --on-surface-variant: #4a4545;

  --break-color: #5b8ea6;
  --break-light: #a8cfe0;

  --outline: #d9cfcf;
  --outline-light: #ede8e8;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.10), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.08);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --font: 'Roboto', sans-serif;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   Reset & Base
=========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--primary-surface);
  color: var(--on-surface);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

/* ===========================
   Header
=========================== */
.app-header {
  background: var(--primary);
  color: #fff;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-logo {
  font-size: 1.8rem;
  line-height: 1;
  animation: wiggle 4s ease-in-out infinite;
  display: inline-block;
}

@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  10% { transform: rotate(-12deg); }
  20% { transform: rotate(10deg); }
  30% { transform: rotate(-8deg); }
  40% { transform: rotate(6deg); }
  50% { transform: rotate(0deg); }
}

.app-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* ===========================
   Main Layout
=========================== */
.app-main {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ===========================
   Cards
=========================== */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 28px;
  animation: fade-in-up 0.4s ease both;
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--on-surface);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title .material-icons {
  color: var(--primary);
  font-size: 1.3rem;
}

/* ===========================
   Timer Card
=========================== */
.timer-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
}

.timer-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(232, 93, 74, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

/* Timer ring SVG */
.timer-ring-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
}

.timer-svg {
  width: 100%;
  height: 100%;
  transform: scaleY(-1); /* flip to animate counterclockwise fill */
}

.ring-track {
  fill: none;
  stroke: var(--primary-container);
  stroke-width: 8;
}

.ring-progress {
  fill: none;
  stroke: var(--primary);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 753.98;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke var(--transition);
}

.timer-card.timer-running .ring-progress {
  stroke: var(--primary);
}

.timer-card.timer-paused .ring-progress {
  stroke: var(--secondary);
  animation: pulse-stroke 1.5s ease-in-out infinite;
}

@keyframes pulse-stroke {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

body[data-timer-type="short-break"] .ring-progress,
body[data-timer-type="long-break"] .ring-progress {
  stroke: var(--break-color);
}

.timer-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.timer-display {
  font-size: 3.2rem;
  font-weight: 300;
  color: var(--on-surface);
  letter-spacing: 2px;
  font-variant-numeric: tabular-nums;
  transition: color var(--transition);
}

.timer-card.timer-running .timer-display {
  color: var(--primary-dark);
  animation: timer-pulse 1s ease-in-out infinite;
}

@keyframes timer-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.timer-card.timer-paused .timer-display {
  color: var(--secondary);
}

.timer-label {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* Timer Type Buttons */
.timer-type-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-timer-type {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: 2px solid var(--outline-light);
  background: var(--surface-variant);
  color: var(--on-surface-variant);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-timer-type em {
  font-style: normal;
  font-weight: 400;
  opacity: 0.75;
  font-size: 0.78rem;
}

.btn-timer-type .material-icons {
  font-size: 1rem;
}

.btn-timer-type:hover:not(:disabled) {
  background: var(--primary-container);
  border-color: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-timer-type:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-timer-type.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-timer-type.active:hover:not(:disabled) {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* Timer Controls (pause/cancel) */
.timer-controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ===========================
   Buttons (general)
=========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition), opacity var(--transition);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 10px 24px;
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn-raised {
  box-shadow: var(--shadow-sm);
}

.btn-raised:hover {
  box-shadow: var(--shadow-md);
}

.btn-outlined {
  background: transparent;
  border: 2px solid var(--outline-light);
  color: var(--on-surface-variant);
  padding: 8px 20px;
}

.btn-outlined:hover {
  background: var(--surface-variant);
}

.btn-text {
  background: transparent;
  color: var(--on-surface-variant);
  padding: 8px 16px;
}

.btn-text:hover {
  background: var(--surface-variant);
}

.btn-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  padding: 0;
}

.btn-icon .material-icons {
  font-size: 1.4rem;
}

.btn-fab {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
  padding: 0;
}

.btn-fab:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-md);
  transform: rotate(90deg);
}

/* ===========================
   Active Task Banner
=========================== */
.active-task-wrapper {
  animation: fade-in-up 0.3s ease both;
}

.active-task-banner {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-md);
  animation: slide-in 0.3s ease;
}

@keyframes slide-in {
  from { transform: translateX(-8px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.active-task-banner .material-icons {
  font-size: 1.5rem;
  flex-shrink: 0;
  opacity: 0.9;
}

.active-task-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 0.8;
  line-height: 1;
  margin-bottom: 2px;
}

.active-task-text {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.3;
  word-break: break-word;
}

/* ===========================
   Note Context Banner
=========================== */
.note-context-banner {
  background: #fff8e1;
  border: 1.5px solid #ffe082;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  animation: fade-in-up 0.4s ease both;
}

.note-icon {
  color: #f9a825;
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.note-content {
  flex: 1;
}

.note-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #7a6000;
  margin-bottom: 4px;
}

.note-text {
  font-size: 0.95rem;
  color: #4a3b00;
  line-height: 1.4;
  white-space: pre-wrap;
}

.note-dismiss {
  background: transparent;
  border: none;
  cursor: pointer;
  color: #9e8a00;
  padding: 2px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition);
}

.note-dismiss:hover {
  background: rgba(0,0,0,0.08);
}

/* ===========================
   Task List
=========================== */
.tasks-card {
  animation-delay: 0.1s;
}

.task-input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  align-items: center;
}

.task-input {
  flex: 1;
  height: 44px;
  border: 1.5px solid var(--outline-light);
  border-radius: var(--radius-full);
  padding: 0 16px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--on-surface);
  background: var(--surface-variant);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.task-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232, 93, 74, 0.15);
  background: var(--surface);
}

.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-empty {
  text-align: center;
  color: var(--on-surface-variant);
  font-size: 0.9rem;
  padding: 24px 0;
  opacity: 0.7;
  font-style: italic;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  background: var(--surface-variant);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
  animation: fade-in-up 0.25s ease both;
}

.task-item:hover {
  background: var(--primary-container);
  border-color: var(--primary-light);
}

.task-item.active-task {
  background: var(--primary-container);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.task-item.completed {
  opacity: 0.55;
  background: var(--surface-variant);
  border-color: transparent;
}

.task-item.completed .task-text {
  text-decoration: line-through;
  cursor: default;
}

.task-checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

.task-text {
  flex: 1;
  font-size: 0.95rem;
  color: var(--on-surface);
  cursor: pointer;
  word-break: break-word;
  line-height: 1.4;
  transition: color var(--transition);
}

.task-text:hover {
  color: var(--primary-dark);
}

.task-delete-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--on-surface-variant);
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition), background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.task-delete-btn .material-icons {
  font-size: 1.1rem;
}

.task-item:hover .task-delete-btn {
  opacity: 1;
}

.task-delete-btn:hover {
  background: rgba(232, 93, 74, 0.12);
  color: var(--primary);
}

/* ===========================
   Modal
=========================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}

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

.modal-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-slow);
}

.modal-overlay.visible .modal-card {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.modal-icon {
  color: var(--primary);
  font-size: 2rem;
}

.modal-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--on-surface);
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  margin-bottom: 20px;
  line-height: 1.5;
}

.note-textarea {
  width: 100%;
  border: 1.5px solid var(--outline-light);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--on-surface);
  background: var(--surface-variant);
  resize: vertical;
  min-height: 100px;
  margin-bottom: 20px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  line-height: 1.5;
}

.note-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232, 93, 74, 0.15);
  background: var(--surface);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 480px) {
  .app-main {
    padding: 16px 12px 40px;
    gap: 16px;
  }

  .card {
    padding: 20px 16px;
  }

  .timer-card {
    padding: 24px 16px;
  }

  .timer-ring-wrapper {
    width: 180px;
    height: 180px;
  }

  .timer-display {
    font-size: 2.6rem;
  }

  .timer-type-buttons {
    gap: 6px;
  }

  .btn-timer-type {
    padding: 7px 12px;
    font-size: 0.8rem;
  }

  .modal-card {
    padding: 24px 20px;
  }
}

/* ===========================
   Accessibility: Focus visible
=========================== */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}