/* ============================================
   GLIMPSE - Design System
   ============================================ */

/* CSS Variables */
:root {
  --color-background: #FEFCFB;
  --color-text: #1A1A1A;
  --color-text-secondary: #6B6B6B;
  --color-border: #E8E4E0;
  --color-primary: #E07A5F;
  --color-primary-hover: #C96A52;
  --color-card: #FAF8F5;
  --color-error: #DC3545;
  --color-success: #28A745;
  --max-width: 480px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

/* Typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@600;700&display=swap');

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.logo {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: 24px;
  color: var(--color-text);
  text-decoration: none;
}

/* Layout */
.app-container {
  max-width: var(--max-width);
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-background);
}

.main-content {
  flex: 1;
  padding: var(--spacing-md);
  padding-bottom: 80px; /* Space for bottom nav */
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-title {
  font-size: 18px;
  font-weight: 600;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-background);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
  padding-bottom: max(var(--spacing-sm), env(safe-area-inset-bottom));
  z-index: 100;
}

.bottom-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  transition: color 0.2s;
}

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

.nav-item svg {
  width: 24px;
  height: 24px;
  margin-bottom: 2px;
}

.nav-item span {
  font-size: 11px;
  font-weight: 500;
}

/* Cards */
.card {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  gap: var(--spacing-xs);
}

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

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

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

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

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

.btn-danger:hover {
  opacity: 0.9;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: 16px;
  font-family: inherit;
  background-color: white;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

textarea.form-input {
  resize: vertical;
  min-height: 100px;
}

/* Alerts */
.alert {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
  font-size: 14px;
}

.alert-error {
  background-color: #FEE2E2;
  color: var(--color-error);
  border: 1px solid #FECACA;
}

.alert-success {
  background-color: #D1FAE5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

/* Avatar */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--color-border);
}

.avatar-sm {
  width: 32px;
  height: 32px;
}

.avatar-lg {
  width: 80px;
  height: 80px;
}

.avatar-xl {
  width: 100px;
  height: 100px;
}

.avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: white;
  font-weight: 600;
  font-size: 16px;
}

.avatar-lg.avatar-placeholder {
  font-size: 32px;
}

/* ============================================
   Feed Styles
   ============================================ */

.feed-empty {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--color-text-secondary);
}

.feed-empty h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.feed-end {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: 14px;
}

.feed-end-icon {
  font-size: 24px;
  margin-bottom: var(--spacing-sm);
}

/* Post Card */
.post-card {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow);
}

.post-header {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  gap: var(--spacing-sm);
}

.post-user-info {
  flex: 1;
}

.post-username {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
  text-decoration: none;
}

.post-username:hover {
  text-decoration: underline;
}

.post-time {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.post-image {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  background-color: var(--color-border);
}

.post-actions {
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.post-action-btn {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-secondary);
  font-size: 14px;
  padding: var(--spacing-xs);
  transition: color 0.2s;
}

.post-action-btn:hover {
  color: var(--color-primary);
}

.post-action-btn.liked {
  color: var(--color-primary);
}

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

.post-action-btn.liked svg {
  fill: var(--color-primary);
}

.post-content {
  padding: 0 var(--spacing-md) var(--spacing-md);
}

.post-caption {
  font-size: 14px;
  margin-bottom: var(--spacing-xs);
}

.post-caption strong {
  font-weight: 600;
  margin-right: var(--spacing-xs);
}

.post-likes {
  font-size: 13px;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.post-likes:hover {
  text-decoration: underline;
}

/* ============================================
   Auth Pages
   ============================================ */

.auth-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow);
}

.auth-logo {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.auth-logo .logo {
  font-size: 36px;
}

.auth-title {
  font-size: 20px;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.auth-footer {
  text-align: center;
  margin-top: var(--spacing-lg);
  font-size: 14px;
  color: var(--color-text-secondary);
}

.auth-footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* ============================================
   Profile Styles
   ============================================ */

.profile-header {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.profile-avatar-container {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.profile-avatar-edit {
  position: absolute;
  bottom: 0;
  right: 0;
  background-color: var(--color-primary);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 2px solid var(--color-background);
}

.profile-avatar-edit svg {
  width: 16px;
  height: 16px;
}

.profile-username {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.profile-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: 14px;
}

.profile-stat-value {
  font-weight: 600;
  color: var(--color-text);
}

/* Profile Grid */
.profile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-top: var(--spacing-md);
}

.profile-grid-item {
  aspect-ratio: 1;
  overflow: hidden;
  position: relative;
}

.profile-grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.2s;
}

.profile-grid-item:hover img {
  opacity: 0.9;
}

.profile-grid-item .delete-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
}

.profile-grid-item:hover .delete-overlay {
  display: flex;
}

/* ============================================
   Friends Styles
   ============================================ */

.friends-section {
  margin-bottom: var(--spacing-lg);
}

.friends-section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.friend-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) 0;
  gap: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

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

.friend-info {
  flex: 1;
}

.friend-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
  text-decoration: none;
}

.friend-name:hover {
  text-decoration: underline;
}

.friend-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.add-friend-form {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.add-friend-form .form-input {
  flex: 1;
}

/* ============================================
   Upload Styles
   ============================================ */

.upload-preview-container {
  margin-bottom: var(--spacing-md);
}

.upload-dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
}

.upload-dropzone:hover {
  border-color: var(--color-primary);
}

.upload-dropzone.has-file {
  border-style: solid;
  border-color: var(--color-primary);
}

.upload-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-sm);
  color: var(--color-text-secondary);
}

.upload-text {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.upload-preview {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  border-radius: var(--border-radius-sm);
  display: none;
}

.upload-preview.visible {
  display: block;
}

/* ============================================
   User Profile (Other Users)
   ============================================ */

.user-profile-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-md);
}

.private-notice {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--color-text-secondary);
}

/* ============================================
   Modal
   ============================================ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background-color: var(--color-background);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 320px;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-weight: 600;
  font-size: 16px;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: var(--spacing-xs);
}

.modal-body {
  padding: var(--spacing-md);
}

/* ============================================
   Utilities
   ============================================ */

.text-center {
  text-align: center;
}

.text-secondary {
  color: var(--color-text-secondary);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden {
  display: none !important;
}

/* ============================================
   Responsive
   ============================================ */

@media (min-width: 481px) {
  .app-container {
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }

  .bottom-nav {
    left: 50%;
    transform: translateX(-50%);
    max-width: var(--max-width);
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }
}

/* Safe area for iOS */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .main-content {
    padding-bottom: calc(80px + env(safe-area-inset-bottom));
  }
}