/* ==============================
   Bloomify — Design System & Styles
   ============================== */

:root {
  /* Color palette — nature-inspired dark theme */
  --bg-primary: #0f1a12;
  --bg-secondary: #162018;
  --bg-card: rgba(30, 50, 35, 0.55);
  --bg-card-hover: rgba(40, 65, 45, 0.65);
  --bg-input: rgba(20, 38, 25, 0.7);

  --text-primary: #e8f0ea;
  --text-secondary: #9bb5a0;
  --text-muted: #5e7d64;

  --accent: #6ecf7e;
  --accent-glow: rgba(110, 207, 126, 0.3);
  --accent-hover: #85e094;
  --accent-soft: rgba(110, 207, 126, 0.12);

  --danger: #e8665a;
  --danger-hover: #f07a70;

  --streak-color: #ffd966;
  --progress-bg: rgba(110, 207, 126, 0.12);

  --border: rgba(110, 207, 126, 0.1);
  --border-focus: rgba(110, 207, 126, 0.35);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 30px rgba(110, 207, 126, 0.15);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- Particles ---- */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% { opacity: 0; transform: translateY(100vh) scale(0); }
  10% { opacity: 0.6; }
  90% { opacity: 0.3; }
  100% { opacity: 0; transform: translateY(-10vh) scale(1); }
}

/* ---- App Container ---- */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  min-height: 100vh;
}

/* ---- Header ---- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  color: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent) 0%, #a8e6b3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.date-display {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.streak-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--streak-color);
  background: rgba(255, 217, 102, 0.1);
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(255, 217, 102, 0.2);
  transition: var(--transition-smooth);
}

.streak-badge svg {
  color: var(--streak-color);
  fill: var(--streak-color);
  opacity: 0.8;
}

.streak-badge.glow {
  box-shadow: 0 0 12px rgba(255, 217, 102, 0.3);
}

/* ---- Plant Section ---- */
.plant-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 12px;
  margin-bottom: 8px;
}

.plant-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 1s ease;
  pointer-events: none;
}

.plant-glow.active {
  opacity: 1;
}

.plant-container {
  position: relative;
  width: 200px;
  height: 280px;
}

.plant-svg {
  width: 100%;
  height: 100%;
}

/* Plant stage transitions */
.plant-stage {
  transition: opacity 0.8s ease-in-out;
}

.plant-stage.visible {
  opacity: 1 !important;
}

/* Flower gentle sway */
.flower {
  animation: flowerSway 3s ease-in-out infinite;
  transform-origin: 100px 95px;
}

@keyframes flowerSway {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(3deg); }
}

.mini-flower {
  animation: miniSway 4s ease-in-out infinite;
}

@keyframes miniSway {
  0%, 100% { transform: rotate(0deg) translateY(0); }
  50% { transform: rotate(-2deg) translateY(-1px); }
}

/* Water drops */
.water-drops {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.water-drop {
  position: absolute;
  width: 8px;
  height: 10px;
  background: radial-gradient(ellipse at 30% 20%, rgba(150, 220, 255, 0.9), rgba(80, 170, 240, 0.6));
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  animation: dropFall 0.8s ease-in forwards;
  opacity: 0;
}

@keyframes dropFall {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  70% { opacity: 0.7; transform: translateY(60px) scale(0.8); }
  100% { opacity: 0; transform: translateY(80px) scale(0.4); }
}

/* Sparkle effect */
.sparkle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: sparkle 0.6s ease-out forwards;
  pointer-events: none;
}

@keyframes sparkle {
  0% { opacity: 1; transform: scale(0) translate(0, 0); }
  50% { opacity: 1; transform: scale(1.2) translate(var(--tx), var(--ty)); }
  100% { opacity: 0; transform: scale(0) translate(calc(var(--tx) * 2), calc(var(--ty) * 2)); }
}

/* Progress Info */
.progress-info {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
}

.progress-ring-container {
  position: relative;
  width: 64px;
  height: 64px;
}

.progress-ring-bg {
  stroke: var(--progress-bg);
}

.progress-ring-fill {
  stroke: var(--accent);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 0 4px var(--accent-glow));
}

.progress-percent {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
}

.progress-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.progress-label span {
  color: var(--text-primary);
  font-weight: 700;
}

/* Stage label */
.stage-label {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
  text-align: center;
  transition: var(--transition-smooth);
  min-height: 1.4em;
}

/* ---- Habits Section ---- */
.habits-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.habits-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.habits-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.btn-add {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.btn-add:hover {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: rotate(90deg);
}

.btn-add:active {
  transform: rotate(90deg) scale(0.9);
}

/* Add Form */
.add-form {
  display: none;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
  animation: slideDown 0.3s var(--transition-smooth);
}

.add-form.visible {
  display: flex;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.habit-input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.92rem;
  outline: none;
  transition: var(--transition-fast);
}

.habit-input::placeholder {
  color: var(--text-muted);
}

.habit-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

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

.btn-cancel, .btn-save {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: none;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-cancel {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-cancel:hover {
  background: rgba(255,255,255,0.05);
}

.btn-save {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn-save:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 14px var(--accent-glow);
}

/* Habit List */
.habit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.habit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  transition: var(--transition-fast);
  animation: habitEnter 0.35s var(--transition-spring);
  cursor: default;
}

.habit-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border);
}

@keyframes habitEnter {
  from { opacity: 0; transform: translateX(-12px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Custom checkbox */
.habit-checkbox {
  position: relative;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.habit-checkbox input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
  margin: 0;
}

.habit-checkbox .checkmark {
  position: absolute;
  inset: 0;
  border-radius: 6px;
  border: 2px solid var(--text-muted);
  background: transparent;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.habit-checkbox .checkmark svg {
  opacity: 0;
  transform: scale(0);
  transition: var(--transition-spring);
  color: var(--bg-primary);
}

.habit-checkbox input:checked + .checkmark {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.habit-checkbox input:checked + .checkmark svg {
  opacity: 1;
  transform: scale(1);
}

.habit-name {
  flex: 1;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: var(--transition-fast);
  user-select: none;
}

.habit-item.completed .habit-name {
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-color: var(--text-muted);
}

.btn-delete {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  opacity: 0;
  flex-shrink: 0;
}

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

.btn-delete:hover {
  background: rgba(232, 102, 90, 0.15);
  color: var(--danger);
}

/* Completed pulse */
@keyframes completePulse {
  0% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.habit-item.just-completed {
  animation: completePulse 0.6s ease-out;
}

/* Empty State */
.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 30px 20px;
  text-align: center;
  color: var(--text-muted);
}

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

.empty-state p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.empty-state strong {
  color: var(--accent);
}

/* ---- Footer ---- */
.app-footer {
  text-align: center;
  padding: 24px 0 8px;
}

.app-footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

/* ---- Responsive ---- */
@media (max-width: 520px) {
  .app-container {
    padding: 16px 12px 32px;
  }

  .habits-section {
    padding: 16px;
    border-radius: var(--radius-md);
  }

  .plant-container {
    width: 170px;
    height: 240px;
  }
}

@media (min-width: 768px) {
  .app-container {
    padding: 32px 20px 48px;
  }
}

/* ---- Utility animation ---- */
.shake {
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}