/* styles.css - Custom CSS Design System for GramLens */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* Colors from DESIGN.md */
  --surface: #ffffff;
  --surface-dim: #dadad8;
  --surface-bright: #f9f9f7;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f4f4f2;
  --surface-container: #eeeeec;
  --surface-container-high: #e8e8e6;
  --surface-container-highest: #e2e3e1;
  --on-surface: #1a1c1b;
  --on-surface-variant: #464553;
  --inverse-surface: #2f3130;
  --inverse-on-surface: #f1f1ef;
  
  --primary: #1f108e;
  --on-primary: #ffffff;
  --primary-container: #3730a3;
  --on-primary-container: #a9a7ff;
  --inverse-primary: #c3c0ff;
  
  --secondary: #4648d4;
  --on-secondary: #ffffff;
  --secondary-container: #6063ee;
  
  --tertiary: #511c00;
  --on-tertiary: #ffffff;
  
  --error: #ba1a1a;
  --on-error: #ffffff;
  --error-container: #ffdad6;
  --on-error-container: #93000a;
  
  --background: #f9f9f7;
  --on-background: #1a1c1b;
  --outline: #777584;
  --outline-variant: #e5e7eb; /* Low-Contrast Outlines */
  
  /* Fonts */
  --font-family: 'Inter', sans-serif;
  
  /* Borders and Spacings */
  --rounded-sm: 0.25rem;
  --rounded-md: 0.5rem;
  --rounded-lg: 0.75rem; /* 12px standard standard elements */
  --rounded-xl: 1.5rem;  /* 24px large elements */
  --rounded-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Base resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--background);
  color: var(--on-surface);
  line-height: 1.5;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography styles */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--on-surface);
}

.display-lg {
  font-size: 48px;
  font-weight: 700;
  line-height: 56px;
  letter-spacing: -0.02em;
}

.headline-lg {
  font-size: 32px;
  font-weight: 600;
  line-height: 40px;
  letter-spacing: -0.01em;
}

.headline-md {
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
}

.body-lg {
  font-size: 18px;
  line-height: 28px;
}

.body-md {
  font-size: 16px;
  line-height: 24px;
  color: var(--on-surface-variant);
}

.body-sm {
  font-size: 14px;
  line-height: 20px;
  color: var(--on-surface-variant);
}

.label-md {
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  letter-spacing: 0.01em;
}

.label-sm {
  font-size: 12px;
  font-weight: 600;
  line-height: 16px;
}

/* Grid & Layout */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  flex: 1;
}

/* Header & Navigation */
header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--outline-variant);
  height: 72px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-container);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--secondary);
}

nav.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

nav.nav-links a {
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  color: var(--on-surface-variant);
  padding: 8px 12px;
  border-radius: var(--rounded-md);
  transition: var(--transition-fast);
}

nav.nav-links a:hover, nav.nav-links a.active {
  color: var(--primary-container);
}

nav.nav-links a.active {
  background-color: var(--surface-container-low);
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: var(--rounded-lg); /* 12px standard */
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-primary:disabled {
  background-color: #a5a2d6;
  cursor: not-allowed;
}

.btn-secondary {
  background-color: var(--surface);
  border-color: var(--outline-variant);
  color: var(--primary-container);
}

.btn-secondary:hover {
  background-color: var(--surface-container-low);
  border-color: var(--outline);
}

.btn-text {
  background: none;
  border: none;
  color: var(--secondary);
  padding: 4px 8px;
}

.btn-text:hover {
  color: var(--primary-container);
  text-decoration: underline;
}

.btn-icon {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--outline-variant);
  background-color: var(--surface);
  color: var(--on-surface-variant);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-icon:hover {
  background-color: var(--background);
  color: var(--on-surface);
}

/* Stepper */
.stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 32px 0;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--on-surface-variant);
  font-size: 14px;
  font-weight: 500;
}

.step-number {
  width: 28px;
  height: 28px;
  border-radius: var(--rounded-full);
  background-color: var(--surface-container-highest);
  color: var(--on-surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition-normal);
}

.step-line {
  height: 1px;
  width: 80px;
  background-color: var(--outline-variant);
}

.step-item.active {
  color: var(--primary-container);
  font-weight: 600;
}

.step-item.active .step-number {
  background-color: var(--primary-container);
  color: var(--on-primary);
}

.step-item.completed {
  color: var(--secondary);
}

.step-item.completed .step-number {
  background-color: var(--secondary);
  color: var(--on-secondary);
}

/* Cards */
.card {
  background-color: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-lg); /* 12px */
  padding: 24px;
  margin-bottom: 24px;
  position: relative;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--on-surface);
}

.card-subtitle {
  font-size: 14px;
  color: var(--on-surface-variant);
  margin-top: -8px;
  margin-bottom: 16px;
}

/* Inputs & Form Fields */
.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--on-surface);
}

.form-input {
  font-family: var(--font-family);
  font-size: 15px;
  padding: 12px 16px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--outline-variant);
  background-color: var(--background);
  color: var(--on-surface);
  transition: var(--transition-fast);
  outline: none;
  width: 100%;
}

.form-input:focus {
  border-color: var(--primary-container);
  background-color: var(--surface);
  box-shadow: 0 0 0 2px rgba(55, 48, 163, 0.15);
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

/* Auth Screens */
.auth-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 48px 24px;
  background-color: var(--background);
}

.auth-card {
  width: 100%;
  max-width: 460px;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-xl); /* 24px */
  padding: 40px;
  box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.02);
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo-placeholder {
  width: 48px;
  height: 48px;
  border-radius: var(--rounded-lg);
  background-color: var(--surface-container-low);
  margin: 0 auto 16px auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-logo-placeholder::after {
  content: '';
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--primary-container);
}

.auth-header h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 6px;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 14px;
  color: var(--on-surface-variant);
}

.auth-footer a {
  color: var(--primary-container);
  text-decoration: none;
  font-weight: 600;
}

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

/* Upload Screen */
.upload-container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 0;
}

.upload-container h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 48px;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--on-surface);
}

.upload-container p {
  font-size: 18px;
  color: var(--on-surface-variant);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.dropzone {
  background-color: var(--surface);
  border: 2px dashed var(--outline-variant);
  border-radius: var(--rounded-xl); /* 24px */
  padding: 60px 40px;
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary-container);
  background-color: rgba(55, 48, 163, 0.02);
}

.dropzone-icon-container {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--background);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-container);
  transition: var(--transition-fast);
}

.dropzone:hover .dropzone-icon-container {
  transform: translateY(-4px);
  background-color: var(--surface-container);
}

.dropzone-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--on-surface);
}

.dropzone-subtext {
  font-size: 14px;
  color: var(--on-surface-variant);
}

.preview-container {
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--outline-variant);
  overflow: hidden;
  position: relative;
  background-color: var(--background);
}

.preview-image {
  width: 100%;
  display: block;
  object-fit: contain;
  max-height: 320px;
}

.remove-preview-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background-color: rgba(26, 28, 27, 0.8);
  color: var(--surface);
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.remove-preview-btn:hover {
  background-color: var(--error);
}

/* Two-Column App Layout (Analyzing & Results) */
.workspace-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 96px; /* Space for sticky actions bar */
}

.workspace-left {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.image-viewport {
  background-color: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-lg);
  padding: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.image-viewport-inner {
  border-radius: var(--rounded-md);
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.05); /* Inner stroke preventing color bleed */
  background-color: var(--background);
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-viewport img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  max-height: 480px;
}

.image-filename {
  font-size: 13px;
  color: var(--on-surface-variant);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  justify-content: center;
}

/* Skeleton Loading (Analyzing State) */
.analyzing-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--outline-variant);
  margin-bottom: 24px;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(55, 48, 163, 0.15);
  border-top-color: var(--primary-container);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.skeleton-shimmer {
  background: linear-gradient(90deg, #f3f3f3 25%, #eaeaea 50%, #f3f3f3 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--rounded-sm);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-item {
  margin-bottom: 24px;
}

.skeleton-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton-line-title {
  height: 18px;
  width: 140px;
  margin-bottom: 10px;
}

.skeleton-line-body {
  height: 14px;
  width: 100%;
  margin-bottom: 8px;
}

.skeleton-line-body-short {
  height: 14px;
  width: 60%;
}

.skeleton-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.skeleton-chips {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.skeleton-chip {
  height: 28px;
  width: 80px;
  border-radius: var(--rounded-full);
}

/* Results Content */
.placement-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.confidence-badge {
  background-color: #EEF2FF;
  color: var(--primary-container);
  padding: 4px 12px;
  border-radius: var(--rounded-full);
  font-size: 13px;
  font-weight: 600;
}

.toggle-group {
  display: inline-flex;
  background-color: var(--background);
  padding: 4px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--outline-variant);
}

.toggle-item {
  padding: 6px 16px;
  border-radius: var(--rounded-md);
  font-size: 13px;
  font-weight: 600;
  color: var(--on-surface-variant);
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  background: none;
}

.toggle-item.active {
  background-color: var(--primary-container);
  color: var(--on-primary);
}

.colors-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.color-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}

.color-dot:hover {
  transform: scale(1.15);
}

.color-dot:hover::after {
  content: attr(data-color);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--inverse-surface);
  color: var(--inverse-on-surface);
  font-size: 11px;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: var(--rounded-sm);
  white-space: nowrap;
  pointer-events: none;
  margin-bottom: 4px;
}

/* Captions List */
.caption-suggestion {
  border-bottom: 1px solid var(--outline-variant);
  padding: 16px 0;
}

.caption-suggestion:first-child {
  padding-top: 0;
}

.caption-suggestion:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.caption-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.caption-text-box {
  background-color: var(--background);
  border-radius: var(--rounded-lg);
  padding: 16px;
  font-size: 15px;
  line-height: 22px;
  color: var(--on-surface);
  margin-bottom: 10px;
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.caption-text-box:hover {
  border-color: var(--outline-variant);
}

.caption-actions {
  display: flex;
  justify-content: flex-end;
}

/* Badges / Chips */
.chips-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--rounded-full);
  transition: var(--transition-fast);
}

.chip-purple {
  background-color: #EEF2FF;
  color: #3730A3;
  border: 1px solid #E0E7FF;
}

.chip-purple:hover {
  background-color: #E0E7FF;
}

.chip-gray {
  background-color: #F3F4F6;
  color: #4B5563;
  border: 1px solid #E5E7EB;
}

.chip-gray:hover {
  background-color: #E5E7EB;
}

.chip-interactive {
  cursor: pointer;
}

.chip-copy-icon {
  opacity: 0.5;
  font-size: 11px;
}

.chip:hover .chip-copy-icon {
  opacity: 1;
}

/* Time Blocks */
.time-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.time-card {
  background-color: var(--background);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-lg);
  padding: 16px;
  text-align: center;
  transition: var(--transition-fast);
}

.time-card:first-child {
  background-color: #EEF2FF;
  border-color: #DDE2FF;
}

.time-card:first-child .time-value {
  color: var(--primary-container);
}

.time-card:hover {
  border-color: var(--outline);
}

.time-day {
  font-size: 13px;
  font-weight: 500;
  color: var(--on-surface-variant);
  margin-bottom: 4px;
}

.time-value {
  font-size: 20px;
  font-weight: 700;
}

/* Tag recommendations list */
.tags-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.tag-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--background);
  border: 1px solid var(--outline-variant);
  padding: 10px 14px;
  border-radius: var(--rounded-lg);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tag-item:hover {
  border-color: var(--outline);
  background-color: var(--surface);
}

.tag-copy-btn {
  color: var(--on-surface-variant);
  font-size: 12px;
  opacity: 0.6;
}

.tag-item:hover .tag-copy-btn {
  opacity: 1;
}

/* Sticky Bottom Action Bar */
.bottom-actions-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--surface);
  border-top: 1px solid var(--outline-variant);
  padding: 16px 0;
  z-index: 90;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.03);
}

.bottom-actions-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Database Settings Screen */
.settings-container {
  max-width: 640px;
  margin: 40px auto;
}

/* History list */
.history-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.history-card {
  background-color: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  transition: var(--transition-fast);
  cursor: pointer;
}

.history-card:hover {
  transform: translateY(-2px);
  border-color: var(--outline);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.history-img-wrapper {
  height: 180px;
  overflow: hidden;
  background-color: var(--surface-container-low);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--outline-variant);
}

.history-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.history-info {
  padding: 16px;
}

.history-title {
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.history-meta {
  font-size: 12px;
  color: var(--on-surface-variant);
  display: flex;
  justify-content: space-between;
}

/* Notification banner */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--inverse-surface);
  color: var(--inverse-on-surface);
  padding: 12px 24px;
  border-radius: var(--rounded-lg);
  font-size: 14px;
  font-weight: 500;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-success {
  border-left: 4px solid var(--secondary);
}

.toast-error {
  border-left: 4px solid var(--error);
}

/* Footer style */
footer {
  border-top: 1px solid var(--outline-variant);
  background-color: var(--surface);
  padding: 24px 0;
  margin-top: auto;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--on-surface-variant);
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  text-decoration: none;
  color: var(--on-surface-variant);
}

.footer-links a:hover {
  color: var(--primary-container);
  text-decoration: underline;
}

/* Responsive adjustment */
@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 320px 1fr;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  header {
    height: auto;
    padding: 12px 0;
  }

  .header-container {
    flex-direction: column;
    gap: 12px;
  }

  nav.nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .stepper {
    flex-wrap: wrap;
    gap: 8px;
  }

  .step-line {
    width: 30px;
  }

  .workspace-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .time-grid {
    grid-template-columns: 1fr;
  }

  .tags-list {
    grid-template-columns: 1fr;
  }

  .bottom-actions-bar {
    position: relative;
    box-shadow: none;
    border-bottom: 1px solid var(--outline-variant);
    margin-top: 24px;
  }

  .bottom-actions-inner {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .bottom-actions-inner .btn {
    width: 100%;
  }

  .upload-container h1 {
    font-size: 28px;
    line-height: 36px;
  }
}