/* ==========================================================================
   Face Warp Check - Journal-Grade Design System
   Academic, research-backed, conservative aesthetic.
   ========================================================================== */

:root {
  --bg-color: #fcfbf9;
  --surface-color: #ffffff;
  --surface-subtle: #f4f3ef;
  --border-color: #e5e3db;
  --border-strong: #c8c5ba;
  
  --text-main: #242424;
  --text-muted: #5c5a54;
  --text-light: #828076;
  
  --accent-green: #2a6f4d;
  --accent-green-bg: #eaf3ee;
  --accent-rust: #9e3d24;
  --accent-rust-bg: #faeee9;
  --accent-amber: #8a6200;
  --accent-amber-bg: #fdf6e7;
  
  --font-serif: "Charter", "Georgia", "Cambria", "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
  
  --container-max: 1040px;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography Defaults */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.25;
}

h1 {
  font-size: 2.2rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.4rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
  margin-top: 1.8rem;
  margin-bottom: 0.8rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--accent-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-rust);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation Header */
header.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-color);
  padding: 1.25rem 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.brand-title:hover {
  color: var(--text-main);
}

nav.main-nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav.main-nav a {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--accent-green);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Main Content Wrapper */
main {
  flex: 1;
  padding: 2.5rem 0 4rem;
}

/* Page Intro & Chips */
.page-intro {
  margin-bottom: 2rem;
}

.subhead {
  font-size: 1.15rem;
  color: var(--text-muted);
  font-style: italic;
  font-family: var(--font-serif);
  margin-bottom: 1rem;
}

.chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-muted);
}

/* Workspace Grid (Home Page) */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.panel {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.panel-header {
  margin-bottom: 1rem;
}

.panel-header h3 {
  font-size: 1.15rem;
  margin-bottom: 0.2rem;
}

.panel-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Upload Drop Zone */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: 4px;
  padding: 2.5rem 1.5rem;
  text-align: center;
  background-color: var(--surface-subtle);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-green);
  background-color: var(--accent-green-bg);
}

.dropzone-icon {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--text-light);
}

.dropzone-text {
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.dropzone-subtext {
  font-size: 0.78rem;
  color: var(--text-light);
  font-family: var(--font-mono);
}

.file-input {
  display: none;
}

/* Preview Image Area */
.preview-container {
  display: none;
  position: relative;
  width: 100%;
  margin-top: 1rem;
  text-align: center;
}

.preview-image {
  max-width: 100%;
  max-height: 280px;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  object-fit: contain;
  background-color: #0000000a;
}

.preview-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.btn-remove {
  background: none;
  border: none;
  color: var(--accent-rust);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  text-decoration: underline;
}

/* Result Slots */
.results-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
}

.result-slot {
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1rem;
  background-color: var(--surface-subtle);
}

.slot-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 0.4rem;
  display: block;
}

.slot-content {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.score-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.score-explanation {
  font-size: 0.78rem;
  color: var(--text-light);
  font-style: italic;
  margin-top: 0.25rem;
}

/* Action Button */
.action-row {
  margin-top: 1.5rem;
}

.btn-primary {
  display: inline-block;
  width: 100%;
  background-color: var(--text-main);
  color: var(--surface-color);
  border: 1px solid var(--text-main);
  padding: 0.75rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  border-radius: 3px;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary:hover:not(:disabled) {
  background-color: #000;
  border-color: #000;
}

.btn-primary:disabled {
  background-color: var(--border-strong);
  border-color: var(--border-strong);
  cursor: not-allowed;
}

/* Status / Alert Message */
.status-banner {
  display: none;
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 3px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.status-info {
  background-color: var(--accent-amber-bg);
  border: 1px solid #e5c365;
  color: var(--accent-amber);
}

.status-error {
  background-color: var(--accent-rust-bg);
  border: 1px solid #f1b3a3;
  color: var(--accent-rust);
}

/* Reference Cards Section */
.reference-section {
  margin-top: 2rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.reference-card {
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--surface-color);
  padding: 1rem;
}

.card-mock-visual {
  height: 120px;
  background-color: var(--surface-subtle);
  border: 1px dashed var(--border-strong);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

.reference-card h4 {
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.reference-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Limits Summary Box */
.limits-box {
  background-color: var(--surface-subtle);
  border-left: 3px solid var(--accent-rust);
  padding: 1.25rem 1.5rem;
  margin-top: 2.5rem;
  border-radius: 0 4px 4px 0;
}

.limits-box h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.limits-box ul {
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.limits-box li {
  margin-bottom: 0.35rem;
}

/* Table styling for Scoring & Data */
.journal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.journal-table th, 
.journal-table td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.journal-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--surface-subtle);
  border-top: 1px solid var(--border-color);
}

/* Article / Text Page Layout */
.article-body {
  max-width: 760px;
  margin: 0 auto;
}

.article-body section {
  margin-bottom: 2.5rem;
}

.citation-box {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: 3px;
  font-size: 0.85rem;
  margin: 1.5rem 0;
}

.citation-box p {
  margin-bottom: 0.5rem;
}

.citation-box p:last-child {
  margin-bottom: 0;
}

/* Site Footer */
footer.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-color);
  padding: 2rem 0;
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--text-light);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}

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

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

/* Responsive Media Queries */
@media (max-width: 820px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  
  .reference-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: 1.75rem;
  }
  
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  
  nav.main-nav ul {
    gap: 1rem;
    flex-wrap: wrap;
  }
  
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}