@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&display=swap');

/* ==========================================================================
   REVOKORE PREMIUM DESIGN SYSTEM TOKENS
   ========================================================================== */
:root {
  /* Colors */
  --bg-primary: #111111;
  --bg-secondary: #151515;
  --bg-card: #151515;
  --bg-card-hover: #1c1c1c;
  --border-color: #252525;
  --border-focus: #22C55E;
  
  --color-primary: #22C55E;         /* Vibrant Athletic Green */
  --color-primary-rgb: 34, 197, 94;
  --color-primary-hover: #16a34a;
  --color-primary-glow: rgba(34, 197, 94, 0.25);
  --color-white: #FFFFFF;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #B8B8B8;
  --color-text-muted: #52525B;
  --color-error: #FF3B30;
  --color-warning: #FF9500;
  --color-info: #007AFF;

  /* Typography */
  --font-display: 'Outfit', sans-serif;
  --font-sans: 'Inter', sans-serif;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-smooth: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   RESET & GLOBAL ATHLETIC TYPOGRAPHY
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html, body {
  height: 100%;
  height: -webkit-fill-available;
  width: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  background-color: var(--bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  line-height: 1.4;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-white);
  line-height: 1.1;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

a:hover {
  color: var(--color-primary-hover);
}

/* ==========================================================================
   REUSABLE UI COMPONENTS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition-smooth);
  width: 100%;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 0 20px var(--color-primary-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: #1A1A1E;
  border-color: var(--border-color);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: #27272E;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--color-white);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: var(--color-text-secondary);
}

.btn-outline-green {
  background-color: rgba(45, 122, 58, 0.04);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline-green:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Cards & Surface Details */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  transition: var(--transition-smooth);
  position: relative;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.08);
}

.card-title {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  display: block;
}

.card-value {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  margin-top: 4px;
}

.card-unit {
  font-size: 14px;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-left: 2px;
}

.card-trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  margin-top: 4px;
}

.card-trend.up {
  color: var(--color-primary);
}

.card-trend.down {
  color: var(--color-error);
}

/* Forms & Form Inputs */
.form-group {
  margin-bottom: var(--spacing-md);
  width: 100%;
}

.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  color: var(--color-text-secondary);
}

.form-input {
  width: 100%;
  background-color: #1A1A1E;
  border: 1px solid var(--border-color);
  color: var(--color-white);
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition-smooth);
}

.form-input:focus {
  border-color: var(--border-focus);
}

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

/* Choice Selection Card */
.choice-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background-color: #16161A;
  border: 1px solid var(--border-color);
  padding: 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-smooth);
  width: 100%;
  text-align: left;
  margin-bottom: var(--spacing-sm);
  color: var(--color-white);
}

.choice-card:hover {
  border-color: rgba(255, 255, 255, 0.1);
  background-color: #1D1D22;
}

.choice-card.selected {
  border-color: var(--color-primary);
  background-color: rgba(var(--color-primary-rgb), 0.03);
}

.choice-icon-wrapper {
  background-color: #27272F;
  border-radius: var(--radius-md);
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.choice-details {
  flex: 1;
}

.choice-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-white);
}

.choice-description {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.3;
}

.choice-radio {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.choice-card.selected .choice-radio {
  border-color: var(--color-primary);
}

.choice-card.selected .choice-radio::after {
  content: '';
  width: 8px;
  height: 8px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

/* Habit Tracker Grid */
.habit-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.habit-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.habit-item:hover {
  background-color: var(--bg-card-hover);
}

.habit-item.active {
  background-color: rgba(var(--color-primary-rgb), 0.04);
  border-color: var(--color-primary);
}

.habit-item.active svg {
  color: var(--color-primary);
}

.habit-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #0B0B0E !important;
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  align-items: center;
  height: calc(65px + env(safe-area-inset-bottom, 0px)) !important;
  padding-bottom: env(safe-area-inset-bottom, 0px) !important;
  box-sizing: border-box;
  z-index: 100;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  flex: 1;
}

.nav-item:hover {
  color: var(--color-text-primary);
}

.nav-item.active {
  color: var(--color-primary);
}

.nav-indicator {
  width: 4px;
  height: 4px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  opacity: 0;
  transition: var(--transition-smooth);
}

.nav-item.active .nav-indicator {
  opacity: 1;
}

/* ==========================================================================
   RESPONSIVE APP WRAPPER LAYOUT
   ========================================================================== */

/* Device Content Screen */
.device-screen {
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Ensure dynamic screens scroll internally and independently of the shell */
.device-screen > div:first-of-type {
  flex: 1 !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  min-height: 0 !important;
}