/* ==========================================================================
   Daniel — Author Site
   Design tokens & shared component styles
   ========================================================================== */

:root {
  /* Palette */
  --paper:        #FAF8F4;
  --paper-dim:     #F3EFE7;
  --beige:        #E8E2D6;
  --beige-line:   #DCD4C4;
  --ink:          #1C2B24;     /* deep forest — primary text & accent */
  --ink-soft:     #2E4138;
  --ink-near-black: #0F1A15;
  --gold:         #B8935F;
  --gold-soft:    #D8C39C;
  --gray-warm:    #6B6258;
  --gray-warm-light: #948B7E;
  --white: #FFFFFF;

  /* Dark mode */
  --d-bg:         #0F1610;
  --d-bg-raised:  #16201A;
  --d-card:       #1B271F;
  --d-line:       #2A3830;
  --d-text:       #F1ECE2;
  --d-text-dim:   #A9A296;

  --shadow-soft: 0 4px 24px rgba(28, 43, 36, 0.06);
  --shadow-card: 0 8px 30px rgba(28, 43, 36, 0.08);
  --shadow-lift: 0 20px 50px rgba(28, 43, 36, 0.14);

  --ease: cubic-bezier(.16,.84,.44,1);
}

html.dark {
  --paper: var(--d-bg);
  --paper-dim: var(--d-bg-raised);
  --beige: var(--d-card);
  --beige-line: var(--d-line);
  --ink: var(--d-text);
  --ink-soft: var(--d-text);
  --gray-warm: var(--d-text-dim);
  --gray-warm-light: #7C7568;
  --white: var(--d-card);
  --shadow-soft: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-card: 0 8px 30px rgba(0,0,0,0.4);
  --shadow-lift: 0 20px 60px rgba(0,0,0,0.55);
}

* { -webkit-tap-highlight-color: transparent; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.font-display {
  font-family: 'Fraunces', Georgia, serif;
  font-optical-sizing: auto;
}

/* Eyebrow / utility label */
.eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

/* Selection */
::selection { background: var(--gold-soft); color: var(--ink-near-black); }

/* Focus visibility for accessibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--beige-line); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-warm-light); }

/* ==========================================================================
   Page load veil
   ========================================================================== */
#load-veil {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--paper);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s var(--ease), visibility 0.6s var(--ease);
}
#load-veil.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.veil-mark {
  font-family: 'Fraunces', serif;
  font-size: 2rem;
  color: var(--ink);
  opacity: 0;
  animation: veilFade 1.1s var(--ease) forwards;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.veil-mark .rule {
  width: 28px; height: 1px; background: var(--gold);
  transform: scaleX(0);
  animation: veilRule 0.8s var(--ease) 0.3s forwards;
}
@keyframes veilFade {
  0% { opacity: 0; transform: translateY(8px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes veilRule { to { transform: scaleX(1); } }

/* ==========================================================================
   Navigation
   ========================================================================== */
#site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  transition: all 0.5s var(--ease);
  padding: 1.6rem 0;
}
#site-nav.scrolled {
  padding: 0.85rem 0;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: 0 1px 0 var(--beige-line), var(--shadow-soft);
}
.nav-link {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.3s var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width 0.35s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 999px;
  padding: 0.85rem 1.9rem;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), background-color 0.35s var(--ease), color 0.35s var(--ease), border-color .35s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow-card);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  background: var(--ink-soft);
}
.btn-gold {
  background: var(--gold);
  color: var(--ink-near-black);
  box-shadow: 0 8px 24px rgba(184,147,95,0.35);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(184,147,95,0.45);
  background: var(--gold-soft);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--beige-line);
}
.btn-outline:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}
.btn-sm { padding: 0.6rem 1.3rem; font-size: 0.84rem; }

/* Mobile menu */
#mobile-panel {
  position: fixed; inset: 0; z-index: 999;
  background: var(--paper);
  transform: translateY(-100%);
  transition: transform 0.55s var(--ease);
  display: flex; flex-direction: column;
  padding: 6.5rem 2rem 2rem;
}
#mobile-panel.open { transform: translateY(0); }
.mobile-link {
  font-family: 'Fraunces', serif;
  font-size: 2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--beige-line);
  color: var(--ink);
}

.hamburger {
  width: 26px; height: 18px; position: relative;
}
.hamburger span {
  position: absolute; left: 0; width: 100%; height: 1.5px;
  background: var(--ink); transition: all 0.35s var(--ease);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 8px; }
.hamburger span:nth-child(3) { top: 16px; }
.hamburger.open span:nth-child(1) { top: 8px; transform: rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { top: 8px; transform: rotate(-45deg); }

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-stagger > * {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0.02s; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 0.22s; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 0.32s; }
.reveal-stagger.in > * { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Cards
   ========================================================================== */
.card {
  background: var(--white);
  border: 1px solid var(--beige-line);
  border-radius: 1.4rem;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), border-color 0.5s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
  border-color: transparent;
}

.glass {
  background: color-mix(in srgb, var(--white) 65%, transparent);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid color-mix(in srgb, var(--white) 40%, var(--beige-line));
}

/* Divider with page-fold mark (signature motif) */
.spine-divider {
  position: relative;
  width: 1px;
  background: var(--beige-line);
}
.spine-divider::before {
  content: '';
  position: absolute; top: 0; left: -3px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

/* Book cover tilt */
.book-tilt {
  transform: perspective(1200px) rotateY(-14deg) rotateX(2deg);
  transition: transform 0.8s var(--ease);
  transform-style: preserve-3d;
}
.book-tilt:hover, .book-tilt.straighten {
  transform: perspective(1200px) rotateY(-4deg) rotateX(0deg);
}

/* Star rating */
.stars { color: var(--gold); letter-spacing: 0.1em; }

/* Back to top */
#back-to-top {
  position: fixed; bottom: 1.8rem; right: 1.8rem; z-index: 800;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--ink); color: var(--paper);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all 0.45s var(--ease);
  box-shadow: var(--shadow-lift);
}
#back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
#back-to-top:hover { transform: translateY(-3px); }

/* Dark mode toggle */
.theme-toggle {
  width: 46px; height: 26px; border-radius: 999px;
  background: var(--beige-line);
  position: relative;
  transition: background 0.4s var(--ease);
  border: 1px solid var(--beige-line);
}
.theme-toggle::after {
  content: '';
  position: absolute; top: 2px; left: 2px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--white);
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.4s var(--ease), background 0.4s var(--ease);
}
html.dark .theme-toggle::after { transform: translateX(20px); background: var(--gold); }
html.dark .theme-toggle { background: var(--ink-soft); }

/* Inputs */
.input-field {
  width: 100%;
  background: var(--white);
  border: 1.5px solid var(--beige-line);
  border-radius: 0.9rem;
  padding: 0.95rem 1.15rem;
  font-size: 0.95rem;
  color: var(--ink);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.input-field::placeholder { color: var(--gray-warm-light); }
.input-field:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--gold) 16%, transparent);
}

/* Footer */
footer a { transition: color 0.3s var(--ease), opacity 0.3s var(--ease); }
.social-icon {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--beige-line);
  transition: all 0.35s var(--ease);
}
.social-icon:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper) !important;
  transform: translateY(-3px);
}

/* Page transition veil for internal nav */
.page-fade-out { animation: pageFadeOut 0.45s var(--ease) forwards; }
@keyframes pageFadeOut { to { opacity: 0; transform: translateY(-8px); } }

/* Accordion (FAQ) */
.faq-item { border-bottom: 1px solid var(--beige-line); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.5s var(--ease), padding 0.5s var(--ease);
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-icon { transition: transform 0.4s var(--ease); }
.faq-item.open .faq-icon { transform: rotate(45deg); }

/* Marquee-ish gentle float for hero portrait */
@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
.float-slow { animation: floatSlow 6s ease-in-out infinite; }

/* Utility: balanced text wrap */
.text-balance { text-wrap: balance; }

/* Skip link */
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 10000;
  background: var(--ink); color: var(--paper);
  padding: 0.8rem 1.4rem; border-radius: 0 0 0.6rem 0;
}
.skip-link:focus { left: 0; }