/* KUE Document Styles - Paper Document Design */

:root {
  /* Paper colors - off-white, warm tones */
  --paper-bg: #f5f3ef;           /* Warm beige background */
  --paper-white: #fefdfb;        /* Paper white (slightly cream) */
  --paper-border: #d4cfc7;       /* Paper edge color */
  --text-black: #2a2522;         /* Softer black */
  --text-gray: #635f5a;          /* Warm gray */
  
  /* Deep shadows for paper effect */
  --shadow-paper: 
    0 1px 2px rgba(0, 0, 0, 0.06),
    0 2px 6px rgba(0, 0, 0, 0.08),
    0 8px 20px rgba(0, 0, 0, 0.12),
    0 16px 40px rgba(0, 0, 0, 0.08);
  
  --shadow-card:
    0 1px 3px rgba(0, 0, 0, 0.05),
    0 4px 12px rgba(0, 0, 0, 0.08);
  
  /* Marker colors */
  --marker-r: #1a5f2a;
  --marker-t: #2563eb;
  --marker-s: #7c3aed;
  --marker-p: #0891b2;
  --marker-h: #ea580c;
}

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

body {
  font-family: 'Source Serif Pro', Georgia, serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-black);
  background: var(--paper-bg);
  -webkit-font-smoothing: antialiased;
}

/* Navigation - subtle, doesn't compete with paper */
.doc-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 243, 239, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--paper-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.nav-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-black);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: opacity 0.2s;
}

.nav-brand:hover {
  opacity: 0.7;
}

.print-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--paper-white);
  border: 1px solid var(--paper-border);
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: var(--text-black);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  transition: all 0.2s;
}

.print-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

/* ============================================
   CONTAINER - CENTERED WITH MAX-WIDTH
   ============================================ */
.doc-container {
  max-width: 900px;  /* Slightly wider for better scaling */
  margin: 3rem auto;
  padding: 0 2rem 4rem;
}

/* ============================================
   HEADER - PAPER DOCUMENT
   ============================================ */
.doc-header {
  text-align: center;
  margin-bottom: 2rem;
  padding: 3rem 3rem 2.5rem;
  background: var(--paper-white);
  border: 1px solid var(--paper-border);
  border-radius: 2px;  /* Very subtle rounded corners */
  box-shadow: var(--shadow-paper);
  position: relative;
}

/* Subtle paper texture effect */
.doc-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.008) 2px,
      rgba(0, 0, 0, 0.008) 4px
    );
  pointer-events: none;
  border-radius: 2px;
}

.doc-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.5rem;
  color: var(--text-black);
}

.doc-category {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-gray);
  margin-bottom: 1rem;
}

.doc-title {
  font-family: 'Inter', sans-serif;
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-black);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.doc-signature {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-gray);
  letter-spacing: 0.05em;
}

/* ============================================
   METADATA - PAPER CARD
   ============================================ */
.doc-meta {
  background: var(--paper-white);
  border: 1px solid var(--paper-border);
  border-radius: 2px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
  position: relative;
}

.doc-meta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.008) 2px,
      rgba(0, 0, 0, 0.008) 4px
    );
  pointer-events: none;
  border-radius: 2px;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.meta-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-gray);
}

.meta-value {
  font-size: 0.95rem;
  color: var(--text-black);
}

.meta-value code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  background: rgba(0, 0, 0, 0.04);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
}

.meta-markers {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.marker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
  letter-spacing: 0.02em;
}

.marker-r { background: #e8f5e9; color: var(--marker-r); }
.marker-t { background: #e3f2fd; color: var(--marker-t); }
.marker-s { background: #f3e5f5; color: var(--marker-s); }
.marker-p { background: #e0f2f1; color: var(--marker-p); }
.marker-h { background: #fff3e0; color: var(--marker-h); }

/* ============================================
   CONTENT - MAIN PAPER DOCUMENT
   ============================================ */
.doc-content {
  background: var(--paper-white);
  border: 1px solid var(--paper-border);
  border-radius: 2px;
  padding: 4rem 4rem 3.5rem;
  box-shadow: var(--shadow-paper);
  position: relative;
  min-height: 60vh;  /* Feels like a real document page */
}

/* Paper texture */
.doc-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.008) 2px,
      rgba(0, 0, 0, 0.008) 4px
    );
  pointer-events: none;
  border-radius: 2px;
}

.doc-content > * {
  position: relative;
  z-index: 1;
}

.doc-content h2 {
  font-family: 'Inter', sans-serif;
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 2.5rem 0 1.25rem;
  color: var(--text-black);
}

.doc-content h2:first-child {
  margin-top: 0;
}

.doc-content h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 2rem 0 0.875rem;
  color: var(--text-black);
}

.doc-content h4 {
  font-family: 'Inter', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.625rem;
}

.doc-content p {
  margin: 0 0 1.25rem 0;
  color: var(--text-black);
}

.doc-content strong {
  font-weight: 600;
  color: var(--text-black);
}

.doc-content ul,
.doc-content ol {
  margin: 0 0 1.25rem 2rem;
}

.doc-content li {
  margin: 0.5rem 0;
}

/* Tables */
.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
  background: var(--paper-white);
  border: 1px solid var(--paper-border);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.doc-content thead {
  background: rgba(0, 0, 0, 0.02);
  border-bottom: 2px solid var(--paper-border);
}

.doc-content th {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  text-align: left;
  padding: 0.875rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-black);
}

.doc-content td {
  padding: 0.875rem 1.25rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  color: var(--text-black);
}

.doc-content tbody tr:hover {
  background: rgba(0, 0, 0, 0.015);
}

/* Code */
.doc-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.05);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  color: #c7254e;
}

.doc-content pre {
  background: #2a2522;
  color: #f0ece8;
  padding: 1.5rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 2rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.doc-content pre code {
  background: none;
  color: inherit;
  padding: 0;
}

/* Blockquotes */
.doc-content blockquote {
  border-left: 4px solid var(--paper-border);
  padding-left: 2rem;
  margin: 2rem 0;
  color: var(--text-gray);
  font-style: italic;
}

/* HR */
.doc-content hr {
  border: none;
  border-top: 1px solid var(--paper-border);
  margin: 2.5rem 0;
}

/* Footer */
.doc-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--paper-border);
  text-align: center;
  color: var(--text-gray);
  font-size: 0.9rem;
}

.footer-sig {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
}

.footer-text {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: #9a9590;
}

/* ============================================
   RESPONSIVE - SCALES NICELY
   ============================================ */
@media (max-width: 1200px) {
  .doc-container {
    max-width: 800px;
  }
}

@media (max-width: 900px) {
  .doc-container {
    max-width: 700px;
    padding: 0 1.5rem 3rem;
  }
  
  .doc-header {
    padding: 2.5rem 2rem 2rem;
  }
  
  .doc-content {
    padding: 3rem 2.5rem;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
  
  .doc-container {
    margin: 1.5rem auto;
    padding: 0 1rem 2rem;
  }
  
  .doc-header {
    padding: 2rem 1.5rem;
  }
  
  .doc-title {
    font-size: 1.75rem;
  }
  
  .doc-content {
    padding: 2rem 1.5rem;
  }
  
  .doc-content h2 {
    font-size: 1.5rem;
  }
  
  .meta-grid {
    grid-template-columns: 1fr;
  }
  
  .nav-content {
    padding: 0.75rem 1rem;
  }
}

@media (max-width: 480px) {
  .doc-header {
    padding: 1.5rem 1rem;
  }
  
  .doc-content {
    padding: 1.5rem 1rem;
  }
  
  .print-btn span {
    display: none;
  }
}