/* ==========================================================================
   DEVPEGS - Authentic Organic Sketchnotes, Paper Themes & Illustrated System
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. PAPER THEMES
   -------------------------------------------------------------------------- */

/* Theme: Warm Moleskine Paper (Authentic Physical Notebook) */
[data-paper-theme="moleskine"] {
  --bg-primary: #f6f2e8;
  --bg-secondary: #eee7d7;
  --bg-tertiary: #e2d9c5;
  --bg-card: #fbf9f4;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(251, 249, 244, 0.92);
  
  --border-subtle: rgba(120, 113, 108, 0.18);
  --border-card: rgba(120, 113, 108, 0.28);
  --border-accent: #6366f1;
  
  --text-primary: #1c1917;
  --text-secondary: #57534e;
  --text-muted: #78716c;
  --text-inverse: #ffffff;
  
  --shadow-card: 0 4px 20px -2px rgba(90, 75, 60, 0.12), 0 1px 4px rgba(60, 50, 40, 0.08);
  --shadow-lg: 0 12px 32px -4px rgba(90, 75, 60, 0.22);
}

[data-paper-theme="moleskine"] body {
  background-color: var(--bg-primary);
  background-image: radial-gradient(circle, rgba(120, 113, 108, 0.12) 1.2px, transparent 1.2px);
  background-size: 24px 24px;
  color: var(--text-primary);
}

[data-paper-theme="moleskine"] .site-header {
  background: rgba(246, 242, 232, 0.94);
  border-bottom: 1px solid var(--border-card);
}

[data-paper-theme="moleskine"] .nav-link {
  color: var(--text-secondary);
}

[data-paper-theme="moleskine"] .nav-link:hover,
[data-paper-theme="moleskine"] .nav-link.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
  border-color: var(--border-card);
}

[data-paper-theme="moleskine"] .hero-section {
  background: linear-gradient(180deg, rgba(238, 231, 215, 0.6) 0%, rgba(246, 242, 232, 0) 100%);
}

[data-paper-theme="moleskine"] .hero-title {
  color: var(--text-primary);
}

[data-paper-theme="moleskine"] .card-title {
  color: var(--text-primary);
}

[data-paper-theme="moleskine"] .card-desc {
  color: var(--text-secondary);
}

[data-paper-theme="moleskine"] .cheatsheet-card {
  background-color: #fbf9f4;
  background-image: 
    repeating-linear-gradient(transparent, transparent 31px, rgba(120, 113, 108, 0.09) 32px);
  border: 1px solid rgba(120, 113, 108, 0.28);
  box-shadow: 0 8px 24px -4px rgba(90, 75, 60, 0.12), 0 2px 6px rgba(0, 0, 0, 0.04);
}

[data-paper-theme="moleskine"] .code-snippet-box {
  background: #181d28;
  border: 1px solid #334155;
}

[data-paper-theme="moleskine"] .visual-diagram-box {
  background: #ede6d6;
  border: 2px dashed rgba(99, 102, 241, 0.45);
}

[data-paper-theme="moleskine"] .flow-step {
  background: #ffffff;
  color: #1e293b;
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 2px 5px rgba(90, 75, 60, 0.1);
}

/* Theme: Midnight Blueprint Mode */
[data-paper-theme="blueprint"] {
  --bg-primary: #0a0f1d;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.85);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --bg-glass: rgba(10, 15, 29, 0.85);
}

[data-paper-theme="blueprint"] body {
  background-image: 
    linear-gradient(rgba(14, 165, 233, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* --------------------------------------------------------------------------
   2. PHYSICAL NOTEBOOK DETAILS (SPIRALS, CLIPS, WASHI TAPE)
   -------------------------------------------------------------------------- */

/* Spiral Binding (Like a physical coiled spiral notebook) */
.spiral-notebook-shell {
  position: relative;
  padding-left: 42px;
}

.spiral-rack {
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 10px;
  width: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  pointer-events: none;
  z-index: 10;
}

.spiral-hole {
  width: 24px;
  height: 9px;
  background: linear-gradient(180deg, #94a3b8 0%, #475569 50%, #0f172a 100%);
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.45);
  position: relative;
}

.spiral-hole::before {
  content: '';
  position: absolute;
  left: -4px;
  top: 1.5px;
  width: 6px;
  height: 6px;
  background: #020617;
  border-radius: 50%;
}

/* Paper Clip Element */
.paper-clip {
  position: absolute;
  top: -14px;
  right: 28px;
  width: 22px;
  height: 48px;
  border: 3.5px solid #cbd5e1;
  border-bottom: none;
  border-radius: 12px 12px 0 0;
  box-shadow: 2px 3px 6px rgba(0, 0, 0, 0.25);
  z-index: 10;
  pointer-events: none;
  transition: transform 0.2s ease;
}

.paper-clip::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 2px;
  right: 2px;
  bottom: -16px;
  border: 3px solid #94a3b8;
  border-top: none;
  border-radius: 0 0 8px 8px;
}

.cheatsheet-card:hover .paper-clip {
  transform: translateY(-2px) rotate(3deg);
}

/* Realistic Washi Tape Strips */
.washi-tape {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%) rotate(-1.5deg);
  width: 120px;
  height: 26px;
  background: rgba(254, 240, 138, 0.75);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
  border-left: 3px dashed rgba(0, 0, 0, 0.2);
  border-right: 3px dashed rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(3px);
  z-index: 5;
  transition: transform 0.2s ease;
}

.washi-tape.tape-cyan {
  background: rgba(186, 230, 253, 0.75);
  transform: translateX(-50%) rotate(1.2deg);
}

.washi-tape.tape-pink {
  background: rgba(251, 207, 232, 0.75);
  transform: translateX(-50%) rotate(-2deg);
}

.cheatsheet-card:hover .washi-tape {
  transform: translateX(-50%) rotate(0deg);
}

/* --------------------------------------------------------------------------
   3. SKETCHNOTE CARDS & VECTOR ILLUSTRATIONS
   -------------------------------------------------------------------------- */

.sketchnote-card {
  position: relative;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s;
  transform: rotate(calc(var(--card-tilt, 0) * 1deg));
}

.sketchnote-card:nth-child(3n+1) {
  --card-tilt: -0.4;
}

.sketchnote-card:nth-child(3n+2) {
  --card-tilt: 0.5;
}

.sketchnote-card:nth-child(3n) {
  --card-tilt: -0.2;
}

.sketchnote-card:hover {
  transform: translateY(-6px) rotate(0deg) scale(1.008);
  z-index: 8;
}

.sketchnote-illustration {
  background: rgba(15, 23, 42, 0.55);
  border: 2px dashed rgba(99, 102, 241, 0.4);
  border-radius: 12px;
  padding: 1.25rem 0.75rem;
  margin: 1.25rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

[data-paper-theme="moleskine"] .sketchnote-illustration {
  background: #ede6d6;
  border-color: rgba(99, 102, 241, 0.4);
}

.sketchnote-svg {
  width: 100%;
  max-width: 480px;
  height: auto;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.25));
}

.sketchnote-caption {
  font-family: var(--font-hand);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-amber);
  margin-top: 0.75rem;
  text-align: center;
  line-height: 1.3;
}

/* --------------------------------------------------------------------------
   4. FULL-FLEDGED WORD/NOTION CANVAS STYLES
   -------------------------------------------------------------------------- */

.notebook-page.paper-moleskine,
[data-paper-theme="moleskine"] .notebook-page {
  background: #fdfbf7;
  color: #1e293b;
  box-shadow: 0 10px 40px -5px rgba(90, 75, 60, 0.25), 0 0 1px rgba(0, 0, 0, 0.1);
}

.notebook-page.paper-moleskine .page-h1,
[data-paper-theme="moleskine"] .notebook-page .page-h1 {
  color: #0f172a;
  border-bottom: 2px solid rgba(120, 113, 108, 0.2);
}

.notebook-page.paper-moleskine .page-prose,
[data-paper-theme="moleskine"] .notebook-page .page-prose {
  color: #334155;
  font-size: 1.05rem;
  line-height: 1.7;
}

.notebook-page.paper-moleskine strong,
[data-paper-theme="moleskine"] .notebook-page strong {
  color: #0f172a !important;
}

.notebook-page.paper-moleskine .code-snippet-box,
[data-paper-theme="moleskine"] .notebook-page .code-snippet-box {
  background: #181d28;
  color: #f8fafc;
}

/* Theme Switcher Button in Header */
.paper-theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.paper-theme-toggle:hover {
  border-color: var(--accent-indigo);
  transform: translateY(-1px);
}