/* ================= ROOT ================= */
:root {
  --bg-main: #e7c6d7;
  --app-bg: #fff3dc;
  --card-bg: #ffffff;
  --accent: #845ef7;
  --success: #22c55e;
  --warning: #ff9f1c;
  --danger: #ff6b6b;
  --text-primary: #1e1b4b;
  --text-secondary: rgba(30, 27, 75, 0.7);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.2);
  --border-radius: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.3);
}

/* ================= DARK MODE ================= */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-main: #1a1638;
    --app-bg: #2d1b69;
    --card-bg: #3a267a;
    --text-primary: #e9d5ff;
    --text-secondary: rgba(233, 213, 255, 0.7);
    --glass-bg: rgba(58, 38, 122, 0.4);
    --glass-border: rgba(132, 94, 247, 0.2);
  }
}

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

body {
  background: var(--bg-main);
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  overscroll-behavior: none;
  transition: var(--transition);
}

/* ================= APP CONTAINER ================= */
.app-container {
  position: relative;
  width: min(100%, 460px);
  padding: 16px;
  perspective: 1200px;
}

/* ================= CARD BASE ================= */
.app,
#weeklyView,
#monthlyAnalytics {
  background: var(--app-bg);
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  max-height: 90vh;
  overflow-y: auto;
}

/* ================= HEADINGS ================= */
h1 {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 24px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-primary);
}

/* ================= FLIP DATE ================= */
.flip-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  justify-content: center;
}

.flip-box {
  background: #ffd166;
  border-radius: 16px;
  padding: 12px 20px;
  text-align: center;
  font-weight: 800;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.flip-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
  opacity: 0;
  transition: var(--transition);
}

.flip-box:hover::before {
  opacity: 1;
}

.flip-box:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-lg);
}

.flip-card {
  transition: var(--transition);
}

/* ================= TRACKER GRID ================= */
.tracker {
  margin-bottom: 24px;
  border-radius: 16px;
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--glass-border);
}

.header-row,
.habit-row {
  display: grid;
  grid-template-columns: 3fr repeat(7, 1fr);
  align-items: center;
  padding: 12px 8px;
}

.header-row {
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: white;
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.activity-col {
  padding-left: 16px;
}

.habit-row {
  border-bottom: 1px solid rgba(132, 94, 247, 0.1);
  transition: background 0.2s ease;
}

.habit-row:hover {
  background: rgba(132, 94, 247, 0.12);
}

.habit-name {
  padding-left: 16px;
  font-weight: 500;
  font-size: 14px;
}

/* ================= HEARTS ================= */
.heart {
  font-size: 24px;
  text-align: center;
  cursor: pointer;
  opacity: 0.3;
  transition: var(--transition);
  user-select: none;
  transform: scale(1);
}

.heart:hover {
  opacity: 0.7;
  transform: scale(1.2);
}

.heart.done {
  opacity: 1;
  transform: scale(1.1);
  animation: heartbeat 0.8s ease infinite alternate;
}

@keyframes heartbeat {
  0% { transform: scale(1.1); }
  100% { transform: scale(1.25); }
}

/* ================= PROGRESS ================= */
.progress-wrap {
  margin: 24px 0;
}

.progress-label {
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.progress-bar {
  height: 16px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.1);
  position: relative;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--warning), #ffbf69);
  border-radius: 12px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(255, 159, 28, 0.4);
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmer 2s infinite linear;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ================= BUTTONS ================= */
button {
  cursor: pointer;
  border: none;
  border-radius: 16px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
  opacity: 0;
  transition: var(--transition);
}

button:hover::before {
  opacity: 1;
}

button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-md);
}

button:active {
  transform: translateY(0) scale(0.98);
}

.reset-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--danger), #ff8787);
  color: white;
  font-size: 16px;
  margin: 16px 0;
}

.add-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #4dabf7, #60a5fa);
  color: white;
  font-size: 16px;
  margin-bottom: 16px;
}

/* ================= MOOD ================= */
.mood {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 24px 0;
  font-size: 36px;
}

.mood span {
  opacity: 0.4;
  cursor: pointer;
  transition: var(--transition);
  transform: scale(1);
  padding: 8px;
  border-radius: 50%;
}

.mood span:hover {
  opacity: 0.8;
  transform: scale(1.2);
  background: rgba(132, 94, 247, 0.2);
}

.mood span.active {
  opacity: 1;
  transform: scale(1.3);
  background: rgba(132, 94, 247, 0.3);
  box-shadow: 0 0 20px rgba(132, 94, 247, 0.5);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 20px rgba(132, 94, 247, 0.5); }
  50% { box-shadow: 0 0 30px rgba(132, 94, 247, 0.8); }
  100% { box-shadow: 0 0 20px rgba(132, 94, 247, 0.5); }
}

/* ================= NOTES ================= */
textarea {
  width: 100%;
  height: 100px;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  padding: 16px;
  font-size: 15px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  resize: none;
  transition: var(--transition);
  color: var(--text-primary);
}

textarea:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(132, 94, 247, 0.4);
  border-color: var(--accent);
}

/* ================= STREAK ================= */
.streak {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  margin: 24px 0;
  padding: 20px;
  background: linear-gradient(135deg, #ff9f1c, #ffd166);
  border-radius: 20px;
  color: white;
  box-shadow: var(--shadow-md);
  animation: glow 2s infinite alternate;
}

@keyframes glow {
  0% { box-shadow: 0 10px 30px rgba(255, 159, 28, 0.4); }
  100% { box-shadow: 0 15px 40px rgba(255, 159, 28, 0.6); }
}

/* ================= NAV ================= */
.nav-row {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  gap: 12px;
}

.nav-row button {
  flex: 1;
  padding: 16px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: white;
  font-size: 15px;
  border-radius: 16px;
}

#backToTracker,
#backToTrackerFromMonthly {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: white;
  margin-top: 24px;
  font-size: 16px;
}

/* ================= VIEWS ================= */
.view {
  position: absolute;
  inset: 16px;
  opacity: 0;
  pointer-events: none;
  transform: rotateY(90deg) translateZ(100px) scale(0.9);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  backface-visibility: hidden;
}

.view.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
  transform: rotateY(0deg) translateZ(0) scale(1);
}

/* ================= ANALYTICS ================= */
.analytics-card {
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  padding: 20px;
  border-radius: 18px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-md);
}

.analytics-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 16px 0;
  font-size: 15px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
}

.analytics-row .progress-bar {
  flex: 1;
  margin: 0 16px;
  height: 14px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

#monthlyAnalytics .progress-fill {
  background: linear-gradient(90deg, #4ade80, var(--success));
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.4);
}

/* ================= WEEKLY BARS ================= */
#weeklyBars > div {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--glass-bg);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
}

#weeklyBars > div:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#weeklyBars > div > span {
  width: 40px;
  text-align: center;
  font-weight: 700;
  font-size: 20px;
  color: var(--accent);
}

#weeklyBars .progress-bar {
  flex: 1;
  height: 16px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

/* ================= FAB ================= */
.fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--success), #86efac);
  color: white;
  font-size: 30px;
  box-shadow: var(--shadow-lg);
  display: grid;
  place-items: center;
  transition: var(--transition);
  z-index: 100;
  border: 3px solid white;
}

.fab:hover {
  transform: scale(1.15) rotate(20deg);
  box-shadow: 0 25px 50px rgba(34, 197, 94, 0.5);
}

/* ================= RESPONSIVE ================= */
@media (max-width: 480px) {
  .app-container {
    padding: 8px;
  }
  
  .flip-bar {
    gap: 8px;
  }
  
  .flip-box {
    padding: 10px 16px;
    font-size: 18px;
  }
  
  .mood {
    gap: 16px;
    font-size: 32px;
  }
  
  .nav-row {
    flex-wrap: wrap;
  }
  
  .nav-row button {
    padding: 12px;
    font-size: 14px;
  }
}

/* ================= FULL SCREEN FIT & SCALING ================= */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-main);
}

.app-container {
  width: 100vw;
  height: 100vh;
  max-width: none;
  padding: 8px;
  perspective: 1200px;
  display: flex;
  flex-direction: column;
}

/* Main card takes full available space */
.app,
#weeklyView,
#monthlyAnalytics {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  overflow: hidden;
}

/* Header fixed height */
header {
  flex-shrink: 0;
  margin-bottom: 12px;
  position: relative;
}

/* Tracker takes available space, scrolls internally if needed */
.tracker {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#habitRows {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

/* Horizontal scroll for grid */
.tracker {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.header-row,
.habit-row {
  min-width: 560px;
  flex-shrink: 0;
}

.header-row > div,
.habit-row > div {
  flex-shrink: 0;
}

/* Progress & buttons fixed */
.progress-wrap,
.horizontal-summary,
.action-buttons {
  flex-shrink: 0;
  margin: 12px 0;
}

/* Navigation fixed at bottom */
.nav-row {
  flex-shrink: 0;
  margin-top: auto;
  padding-top: 12px;
}

/* Hide all scrollbars globally but keep functionality */
* {
  scrollbar-width: none;
}

*::-webkit-scrollbar {
  display: none;
}

/* Ensure views fill height */
.view {
  height: 100%;
  inset: 0;
  padding: 8px;
}

.view.active {
  position: static;
}

/* ================= STREAK AND NOTES POSITIONING ================= */
.streak {
  position: absolute;
  top: 8px;
  right: 8px;
  background: linear-gradient(135deg, #ff9f1c, #ffd166);
  color: white;
  padding: 8px 16px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

#notes {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 200px;
  height: 60px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 8px;
  font-size: 14px;
  color: var(--text-primary);
  resize: none;
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

#notes:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(132, 94, 247, 0.3);
}

/* ================= MONTHLY ANALYTICS SCROLLABLE SECTIONS ================= */
#monthlyAnalytics {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

#habitAnalytics,
#weeklyAnalytics {
  flex: 1;
  min-height: 0;
  max-height: 35vh;
  overflow-y: auto;
  padding-right: 8px;
}

/* Custom scrollbar for analytics sections (visible but thin) */
#habitAnalytics::-webkit-scrollbar,
#weeklyAnalytics::-webkit-scrollbar {
  width: 6px;
  display: block;
}

#habitAnalytics::-webkit-scrollbar-track,
#weeklyAnalytics::-webkit-scrollbar-track {
  background: transparent;
}

#habitAnalytics::-webkit-scrollbar-thumb,
#weeklyAnalytics::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
}

#habitAnalytics::-webkit-scrollbar-thumb:hover,
#weeklyAnalytics::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.5);
}

/* Firefox */
#habitAnalytics,
#weeklyAnalytics {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}