/* ============================================
   DietGPT — iOS "Health" Inspired Design System
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* iOS Dark Mode Foundation */
  --bg-primary: #000000;
  --bg-secondary: #0A0A0C;
  --bg-card: rgba(28, 28, 30, 0.7); /* Translucent dark gray */
  --bg-list: #1C1C1E;
  --bg-input: rgba(118, 118, 128, 0.24);
  --bg-hover: rgba(118, 118, 128, 0.3);

  /* iOS Text */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(235, 235, 245, 0.6);
  --text-muted: rgba(235, 235, 245, 0.3);

  /* Borders & Dividers */
  --border-default: rgba(84, 84, 88, 0.65);
  --border-list: rgba(84, 84, 88, 0.3);

  /* Semantic Health Colors */
  --health-red: #FF3B30;     /* Activity, Calories */
  --health-green: #34C759;   /* Exercise, Protein */
  --health-blue: #007AFF;    /* Stand, Water */
  --health-cyan: #32ADE6;    /* Carbs */
  --health-orange: #FF9500;  /* Fats */
  --health-indigo: #5E5CE6;  /* Workouts */
  --health-pink: #FF2D55;    /* Custom */

  /* Global Accent */
  --accent: var(--health-red);
  --accent-light: #FF6961;

  /* Sleek iOS Geometry */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Depth */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.5);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  --sidebar-width: 260px;
}

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

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

body {
  /* System Font Stack - compact & highly legible */
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  /* Elegant blurry shape background inspired by iOS Fitness app */
  background-image: 
    radial-gradient(circle at top left, rgba(255, 59, 48, 0.15), transparent 40%),
    radial-gradient(circle at bottom right, rgba(52, 199, 89, 0.1), transparent 40%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.4;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
}

ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Phosphor Icons Integration ---------- */
i.ph, i.ph-fill, i.ph-bold {
  vertical-align: middle;
  display: inline-block;
}

/* ---------- Layout Shell ---------- */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-width);
  background: rgba(10, 10, 12, 0.85);
  border-right: 1px solid var(--border-list);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--transition-base);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.sidebar-brand {
  padding: 32px 24px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand .brand-icon {
  width: 32px;
  height: 32px;
  color: var(--health-red);
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-brand .brand-name {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav a, .sidebar-nav button {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 500;
  transition: background var(--transition-fast);
  width: 100%;
}

.sidebar-nav a:hover, .sidebar-nav button:hover {
  background: var(--bg-hover);
}

.sidebar-nav a.active {
  background: rgba(255, 59, 48, 0.15);
  color: var(--health-red);
  font-weight: 600;
}

.sidebar-nav .nav-icon {
  font-size: 1.4rem;
  width: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-nav .nav-separator {
  height: 1px;
  background: var(--border-list);
  margin: 16px 0;
}

.sidebar-user {
  padding: 24px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-user img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
}

.sidebar-user .user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user .user-name {
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user .user-email {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- Main Content ---------- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.page-container {
  max-width: 900px; /* Keep it compact like a mobile app view but centered */
  margin: 0 auto;
  padding: 48px 32px 80px;
}

/* ---------- Page Header ---------- */
.page-header {
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 4px;
}

/* ---------- iOS Style Cards ---------- */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- iOS Settings List Styling ---------- */
.ios-list {
  background: var(--bg-list);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

.ios-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-list);
  background: transparent;
}

.ios-list-item:last-child {
  border-bottom: none;
}

.ios-list-label {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
}

.ios-list-value {
  font-size: 1.05rem;
  color: var(--text-secondary);
  text-align: right;
  border: none;
  background: transparent;
  width: 50%;
}

.ios-list-value:focus {
  outline: none;
  color: var(--text-primary);
}

select.ios-list-value {
  direction: rtl;
  background: transparent;
  padding-right: 0;
}

select.ios-list-value option {
  direction: ltr;
  background-color: var(--bg-list);
  color: var(--text-primary);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--health-red);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-light);
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-hover);
}

.btn-danger {
  color: var(--health-red);
}

.btn-ghost {
  color: var(--health-red);
  padding: 8px;
  font-size: 1.2rem;
}

.btn-block { width: 100%; display: flex; }

/* ---------- Stats Grid (Health Rings) ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-list);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.stat-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.stat-unit {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.c-cal { color: var(--health-red); }
.c-pro { color: var(--health-green); }
.c-car { color: var(--health-cyan); }
.c-fat { color: var(--health-orange); }

/* ---------- Progress Bar ---------- */
.progress-container {
  background: var(--bg-list);
  padding: 20px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 1rem;
  font-weight: 600;
}

.progress-header .val {
  color: var(--health-red);
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--bg-input);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--health-red);
  border-radius: var(--radius-full);
}

/* ---------- Chat UI ---------- */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-bubble {
  max-width: 85%;
  padding: 14px 18px;
  border-radius: 20px;
  font-size: 1.05rem;
  line-height: 1.5;
  animation: slideUp 0.3s ease;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.chat-bubble * {
  max-width: 100%;
}

.chat-bubble p {
  margin-bottom: 8px;
}

.chat-bubble p:last-child {
  margin-bottom: 0;
}

.chat-bubble ul, .chat-bubble ol {
  margin-left: 24px;
  margin-bottom: 8px;
}

.chat-bubble-user {
  align-self: flex-end;
  background: var(--health-blue);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-bubble-ai {
  align-self: flex-start;
  background: var(--bg-list);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.chat-bubble-system {
  align-self: center;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.chat-input-bar {
  display: flex;
  gap: 12px;
  padding: 16px 0;
}

.chat-input-bar input {
  flex: 1;
  padding: 14px 20px;
  background: var(--bg-list);
  border: 1px solid var(--border-list);
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  outline: none;
}

.chat-input-bar input:focus {
  border-color: var(--health-blue);
}

.chat-send-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--health-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

/* ---------- Meal Log ---------- */
.meal-timeline {
  display: flex;
  flex-direction: column;
  gap: 1px; /* border hack */
  background: var(--border-list);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

.meal-entry {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-list);
}

.meal-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-input);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--health-orange);
}

.meal-details {
  flex: 1;
}

.meal-name {
  font-size: 1.05rem;
  font-weight: 600;
}

.meal-meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.meal-calories {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
}

/* ---------- Pre-formatted text for Plans ---------- */
.plan-data-section {
  background: var(--bg-list);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
}

.plan-data-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.plan-data-section ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-data-section li {
  font-size: 1.05rem;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-list);
}

.plan-data-section li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* ---------- Saved Plans Grid ---------- */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.plan-card {
  background: var(--bg-list);
  padding: 24px;
  border-radius: var(--radius-lg);
  display: block;
}

.plan-card .plan-date {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 4px;
}

.plan-card .plan-cal {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--health-red);
}

.plan-card .plan-macros {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ---------- Flash Alerts ---------- */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-list);
}

.alert-error { color: var(--health-red); }
.alert-success { color: var(--health-green); }

/* ---------- Profile Layout ---------- */
.profile-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 0;
  margin-bottom: 20px;
}

.profile-top img, .profile-top .avatar-placeholder {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.profile-top .avatar-placeholder {
  background: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.profile-top h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.profile-badges {
  display: flex;
  gap: 8px;
}

.profile-badge {
  background: var(--bg-list);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ---------- Animations ---------- */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in > * {
  animation: slideUp 0.4s ease both;
}

.animate-in > *:nth-child(1) { animation-delay: 0ms; }
.animate-in > *:nth-child(2) { animation-delay: 50ms; }
.animate-in > *:nth-child(3) { animation-delay: 100ms; }
.animate-in > *:nth-child(4) { animation-delay: 150ms; }

/* ---------- Login Page ---------- */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 40px 32px;
  border-radius: var(--radius-xl);
  text-align: center;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-md);
}

.login-logo {
  font-size: 3.5rem;
  color: var(--health-red);
  margin-bottom: 16px;
}

.login-card h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  line-height: 1.5;
}

.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: #fff;
  color: #000;
  padding: 14px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1.05rem;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.google-btn svg {
  width: 24px;
  height: 24px;
}

.google-btn:hover {
  transform: scale(0.98);
  opacity: 0.9;
}

/* ---------- Mobile ---------- */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-brand { padding-top: 76px; }
  .main-content { margin-left: 0; }
  .page-container { padding: 76px 20px 80px; }
  .stats-grid { grid-template-columns: 1fr; }
}

/* ---------- Mobile Sidebar Toggle ---------- */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  width: 44px;
  height: 44px;
  background: var(--bg-list);
  border-radius: var(--radius-full);
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--health-red);
}

@media (max-width: 768px) {
  .sidebar-toggle { display: flex; }
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 90;
}

.sidebar-overlay.active { display: block; }