/* ==========================================================
   Harry Potter E-Book — Araf Studio HP Official
   ========================================================== */

@font-face {
  font-family: 'HarryPotter';
  src: url('../fonts/HarryPotter.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root{
  /* ---- palette ---- */
  --bg-0:        #06040c;
  --bg-1:        #0b0714;
  --bg-2:        #140b22;
  --maroon:      #6e0d10;
  --maroon-deep: #3a0507;
  --gold:        #c9a341;
  --gold-bright: #f1d374;
  --gold-dim:    #8a7431;
  --parchment:   #efe4c8;
  --ink:         #e9e2d6;
  --ink-dim:     #b9b0a4;

  --glass-bg:      rgba(233, 220, 190, 0.055);
  --glass-bg-2:    rgba(233, 220, 190, 0.09);
  --glass-border:  rgba(201, 163, 65, 0.28);
  --glass-border-2:rgba(201, 163, 65, 0.5);
  --shadow-deep:   0 30px 60px -20px rgba(0,0,0,0.7);

  --font-display: 'HarryPotter', 'Cinzel', 'Playfair Display', serif;
  --font-body:    'Hind Siliguri', 'Noto Sans Bengali', sans-serif;
  --font-caption: 'EB Garamond', serif;

  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;

  color-scheme: dark;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background:
    radial-gradient(ellipse 90% 60% at 50% -10%, #211334 0%, transparent 60%),
    radial-gradient(ellipse 70% 50% at 85% 15%, rgba(110,13,16,0.35) 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 45%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display:block; }

::selection{ background: var(--gold); color: #1a1105; }

:focus-visible{
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- background fx ---- */
#fx-canvas{
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}
.grain{
  position: fixed; inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============ header ============ */
.site-header{
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  background: linear-gradient(180deg, rgba(10,6,16,0.72), rgba(10,6,16,0.35));
  border-bottom: 1px solid var(--glass-border);
}
.header-inner{
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand{ display:flex; align-items:center; gap: 12px; }
.brand-mark{
  width: 40px; height: 40px;
  object-fit: contain;
  border-radius: 50%;
  border: 1px solid var(--glass-border-2);
  background: radial-gradient(circle at 35% 30%, rgba(241,211,116,0.18), rgba(110,13,16,0.28));
  box-shadow: 0 0 18px rgba(201,163,65,0.25), inset 0 0 10px rgba(0,0,0,0.35);
  padding: 3px;
}
.brand-text{ display:flex; flex-direction: column; line-height: 1.15; }
.brand-line1{ font-family: var(--font-caption); letter-spacing: 3px; font-size: 13px; color: var(--gold-bright); }
.brand-line2{ font-family: var(--font-caption); letter-spacing: 4px; font-size: 10px; color: var(--ink-dim); }

.header-nav{ display:flex; gap: 26px; font-size: 15px; }
.header-nav a{
  position: relative;
  color: var(--ink-dim);
  transition: color .25s ease;
  padding-bottom: 3px;
}
.header-nav a::after{
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:1px;
  background: var(--gold-bright); transition: width .3s ease;
}
.header-nav a:hover{ color: var(--gold-bright); }
.header-nav a:hover::after{ width: 100%; }

/* ============ layout helpers ============ */
main{ position: relative; z-index: 2; }
section{ position: relative; padding: 0 24px; }

.eyebrow{
  font-family: var(--font-caption);
  font-style: italic;
  letter-spacing: 2px;
  color: var(--gold-bright);
  font-size: 15px;
  margin: 0 0 10px;
  opacity: 0.9;
}

/* ============ hero ============ */
.hero{
  padding-top: 130px;
  padding-bottom: 60px;
  overflow: hidden;
}
.hero-glow{
  position: absolute;
  top: -10%; left: 50%;
  width: 900px; height: 700px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(201,163,65,0.13), transparent 70%);
  filter: blur(10px);
  z-index: -1;
  pointer-events: none;
}
.hero-inner{
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 56px;
  align-items: center;
}

.hero-poster-wrap{ position: relative; justify-self: start; }
.glass-frame{
  position: relative;
  border-radius: var(--radius-lg);
  padding: 10px;
  background: linear-gradient(160deg, var(--glass-bg-2), var(--glass-bg));
  border: 1px solid var(--glass-border-2);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: var(--shadow-deep), inset 0 1px 0 rgba(255,255,255,0.08);
  overflow: hidden;
}
.glass-frame img{
  border-radius: calc(var(--radius-lg) - 8px);
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  object-position: 50% 20%;
}
.poster-sheen{
  position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,0.16) 45%, transparent 60%);
  transform: translateX(-120%);
  animation: sheen 6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes sheen{
  0%, 40% { transform: translateX(-120%); }
  60%, 100% { transform: translateX(120%); }
}
.hero-poster-glow{
  position: absolute; inset: -20px;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(201,163,65,0.35), transparent 70%);
  filter: blur(20px);
  animation: pulseglow 4.5s ease-in-out infinite;
}
@keyframes pulseglow{
  0%,100%{ opacity: 0.55; }
  50%{ opacity: 1; }
}

.hero-copy{ max-width: 640px; }
.hero-title{
  font-family: var(--font-display);
  margin: 0 0 18px;
  line-height: 1.05;
  font-weight: 400;
}
.hero-title .line{
  display:block;
  font-size: clamp(38px, 6vw, 68px);
  color: var(--parchment);
  text-shadow: 0 0 24px rgba(201,163,65,0.35), 0 4px 20px rgba(0,0,0,0.6);
}
.hero-title .accent{
  background: linear-gradient(180deg, var(--gold-bright), var(--gold) 60%, var(--gold-dim));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-tagline{
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-dim);
  margin: 0 0 30px;
}
.hero-actions{ display:flex; align-items:center; gap: 22px; flex-wrap: wrap; }
.hero-meta{ font-family: var(--font-caption); font-style: italic; color: var(--gold-dim); font-size: 14px; }

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid var(--glass-border-2);
  position: relative;
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.btn-primary{
  color: #1a1105;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  box-shadow: 0 10px 26px -8px rgba(201,163,65,0.55);
}
.btn-primary:hover{
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -6px rgba(201,163,65,0.7);
}
.btn-primary:active{ transform: translateY(0); }

.hero-divider{
  max-width: 1200px;
  margin: 20px auto 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 24px;
}
.hero-divider span{
  flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border-2), transparent);
}
.hero-divider .spark{ color: var(--gold-bright); font-style: normal; opacity: 0.8; }

/* ============ books section ============ */
.books{ padding-top: 70px; padding-bottom: 40px; }
.section-head{
  max-width: 720px;
  margin: 0 auto 50px;
  text-align: center;
}
.section-head h2{
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  color: var(--parchment);
  margin: 0 0 12px;
  font-weight: 400;
  letter-spacing: 1px;
}
.section-sub{ color: var(--ink-dim); font-size: 15.5px; line-height: 1.7; margin: 0; }

.book-grid{
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 30px 26px;
}

.book-card{
  position: relative;
  border-radius: var(--radius-md);
  padding: 16px;
  background: linear-gradient(160deg, var(--glass-bg-2), var(--glass-bg));
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  box-shadow: 0 20px 40px -18px rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
  gap: 14px;
  opacity: 0;
  transform: translateY(28px);
  transition: transform .6s cubic-bezier(.2,.7,.2,1), opacity .6s ease, border-color .3s ease, box-shadow .3s ease;
}
.book-card.in-view{ opacity: 1; transform: translateY(0); }
.book-card:hover{
  border-color: var(--glass-border-2);
  box-shadow: 0 26px 50px -16px rgba(0,0,0,0.7), 0 0 30px -6px rgba(201,163,65,0.25);
}
.book-card:hover .card-sheen{ transform: translateX(120%); }

.card-poster{
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 2/3;
  width: 100%;
  max-width: 200px;
  margin: 0 auto;
  border: 1px solid rgba(201,163,65,0.2);
  box-shadow: 0 12px 24px -10px rgba(0,0,0,0.7);
}
.card-poster img{
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.book-card:hover .card-poster img{ transform: scale(1.045); }
.card-sheen{
  position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 35%, rgba(255,255,255,0.22) 48%, transparent 60%);
  transform: translateX(-130%);
  transition: transform .9s ease;
  pointer-events: none;
}

.card-number{
  position: absolute;
  top: 8px; left: 8px;
  font-family: var(--font-caption);
  font-style: italic;
  font-size: 13px;
  color: var(--gold-bright);
  background: rgba(10,6,16,0.55);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 2px 9px;
  backdrop-filter: blur(6px);
}

.card-body{ text-align: center; display:flex; flex-direction: column; gap: 8px; flex: 1; }
.card-title{
  font-family: var(--font-caption);
  font-size: 16.5px;
  line-height: 1.35;
  color: var(--parchment);
  margin: 0;
  min-height: 44px;
  display:flex; align-items:center; justify-content:center;
}
.card-note{ font-size: 13px; color: var(--ink-dim); margin: 0 0 4px; }

.card-download{
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--gold-bright);
  background: rgba(201,163,65,0.08);
  border: 1px solid var(--glass-border-2);
  transition: background .25s ease, color .25s ease, transform .2s ease;
}
.card-download:hover{
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: #1a1105;
  transform: translateY(-2px);
}
.card-download svg{ width: 15px; height: 15px; }

/* ============ about ============ */
.about{ padding: 90px 24px 100px; }
.about-inner{
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 46px 36px;
}
.glass-panel{
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--glass-bg-2), var(--glass-bg));
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow: var(--shadow-deep);
}
.about-inner h2{
  font-family: var(--font-display);
  font-size: clamp(24px,3.4vw,34px);
  color: var(--parchment);
  font-weight: 400;
  margin: 0 0 18px;
}
.about-inner p{
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-dim);
  margin: 0;
}

/* ============ footer ============ */
.site-footer{
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 34px 24px 44px;
  border-top: 1px solid var(--glass-border);
  font-size: 13.5px;
  color: var(--ink-dim);
}
.site-footer p{ margin: 4px 0; }
.footer-sub{ font-family: var(--font-caption); font-style: italic; color: var(--gold-dim); }

/* ============ responsive ============ */
@media (max-width: 860px){
  .hero-inner{
    grid-template-columns: 1fr;
    text-align: center;
    gap: 34px;
  }
  .hero-poster-wrap{ justify-self: center; width: 200px; }
  .hero-actions{ justify-content: center; }
  .header-nav{ gap: 16px; font-size: 13.5px; }
}

@media (max-width: 480px){
  .header-inner{ padding: 12px 16px; }
  .brand-line2{ display: none; }
  .hero{ padding-top: 110px; }
  .book-grid{ grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 22px 16px; }
  .card-poster{ max-width: 100%; }
}