/* ====== Base ====== */
:root{
  --bg: #0b0d12;
  --panel: rgba(255,255,255,0.06);
  --panel-2: rgba(255,255,255,0.09);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --muted-2: rgba(255,255,255,0.52);
  --border: rgba(255,255,255,0.12);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);

  --radius: 18px;
  --radius-sm: 12px;

  --container: 1100px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 900px at 20% 10%, rgba(99,102,241,0.16), transparent 55%),
              radial-gradient(900px 700px at 80% 30%, rgba(16,185,129,0.12), transparent 52%),
              var(--bg);
  line-height: 1.5;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }
code{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }

.container{
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.sr-only{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 10px;
  background: #fff;
  color: #000;
  padding: 10px 12px;
  border-radius: 10px;
  z-index: 9999;
}
.skip-link:focus{ left: 10px; }

.muted{ color: var(--muted); }
.tiny{ font-size: 0.9rem; color: var(--muted-2); }

/* ====== Header ====== */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10, 12, 18, 0.65);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 16px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark{
  width: 40px; height: 40px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(99,102,241,0.9), rgba(16,185,129,0.85));
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow);
}

.brand-text small{
  display: block;
  color: var(--muted);
  margin-top: 1px;
}

/* Nav */
.nav{ display: flex; align-items: center; gap: 12px; }
.nav-menu{
  list-style: none;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0; margin: 0;
}
.nav-menu a{
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--muted);
}
.nav-menu a:hover{
  text-decoration: none;
  color: var(--text);
  background: var(--panel);
}

.nav-toggle{
  display: none;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
}
.hamburger{
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  margin: 0 auto;
  position: relative;
}
.hamburger::before,
.hamburger::after{
  content:"";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text);
}
.hamburger::before{ top: -6px; }
.hamburger::after{ top: 6px; }

/* ====== Hero ====== */
.hero{
  padding: 56px 0 26px;
}
.hero-inner{
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: start;
}
.kicker{
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
}
.hero h1{
  margin: 12px 0 10px;
  font-size: clamp(2.0rem, 3.2vw, 3.0rem);
  line-height: 1.12;
}
.lede{
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 58ch;
}
.hero-cta{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.hero-badges{
  list-style: none;
  padding: 0; margin: 10px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-badges li{
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-card{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-card-top{
  padding: 18px 18px 12px;
  border-bottom: 1px solid var(--border);
}
.h6{ margin: 0 0 6px; font-size: 0.95rem; letter-spacing: 0.2px; }
.hero-card-stats{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}
.stat{
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.stat:nth-child(odd){ border-right: 1px solid var(--border); }
.stat-label{ display:block; color: var(--muted); font-size: 0.9rem; }
.stat-value{ display:block; font-weight: 700; margin-top: 4px; }

.hero-card-actions{
  padding: 14px 18px 18px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ====== Sections ====== */
.section{
  padding: 38px 0;
}
.section-head{
  margin-bottom: 14px;
}
.section-head h2{
  margin: 0 0 6px;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
}
.section-head p{ margin: 0; }

/* Cards */
.card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}

.divider{
  height: 1px;
  background: var(--border);
  margin: 14px 0;
}

.list{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

/* ====== Profile ====== */
.profile-grid{
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
}
.profile-header{
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.avatar{
  width: 46px; height: 46px;
  border-radius: 16px;
  display: grid; place-items: center;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  font-weight: 800;
}
.profile-name{ margin: 0; }
.profile-title{ margin: 2px 0 0; color: var(--muted); }

.profile-body p{ margin: 0 0 10px; }
.profile-footer{
  display: flex;
  gap: 10px;
  margin-top: 6px;
}
.pill{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--muted);
}
.pill:hover{ color: var(--text); text-decoration: none; }

/* ====== Toolbar (Search/Filters) ====== */
.toolbar{
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  margin: 14px 0 16px;
}
.search input{
  width: min(420px, 70vw);
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  outline: none;
}
.search input:focus{
  border-color: rgba(99,102,241,0.7);
}

.filters{ display: flex; gap: 8px; flex-wrap: wrap; }
.chip{
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--muted);
  cursor: pointer;
}
.chip.is-active{
  color: var(--text);
  background: rgba(99,102,241,0.22);
  border-color: rgba(99,102,241,0.5);
}

/* ====== Books Grid ====== */
.grid{
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}
.book{
  grid-column: span 4;
  overflow: hidden;
  padding: 0;
}
.book-inner{
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 14px;
}
.cover{
  width: 140px;
  aspect-ratio: 3 / 4;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.cover img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cover .ph{
  width: 86%;
  height: 86%;
  border-radius: 12px;
  border: 1px dashed rgba(255,255,255,0.28);
  display: grid;
  place-items: center;
  color: var(--muted-2);
  text-align: center;
  padding: 10px;
  font-size: 0.9rem;
}

.book h3{
  margin: 4px 0 6px;
  font-size: 1.05rem;
  line-height: 1.25;
}
.book .meta{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 10px;
}
.badge{
  font-size: 0.86rem;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
}
.desc{
  color: var(--muted);
  margin: 0 0 12px;
}

.book-actions{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.empty{
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px dashed rgba(255,255,255,0.22);
  border-radius: var(--radius);
  color: var(--muted);
}

/* ====== Buttons ====== */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}
.btn:hover{ text-decoration: none; filter: brightness(1.05); }

.btn-primary{
  background: linear-gradient(135deg, rgba(99,102,241,0.86), rgba(16,185,129,0.78));
  border-color: rgba(255,255,255,0.16);
}
.btn-secondary{
  background: rgba(99,102,241,0.18);
  border-color: rgba(99,102,241,0.45);
}
.btn-ghost{
  background: rgba(255,255,255,0.04);
}
.btn-link{
  background: transparent;
  border-color: transparent;
  color: var(--muted);
  padding-left: 0;
  padding-right: 0;
}
.btn-link:hover{ color: var(--text); }

/* ====== Contact / Footer ====== */
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.site-footer{
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

/* ====== Responsive ====== */
@media (max-width: 920px){
  .hero-inner{ grid-template-columns: 1fr; }
  .profile-grid{ grid-template-columns: 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }

  .book{ grid-column: span 6; }
}

@media (max-width: 680px){
  .nav-toggle{ display: inline-flex; align-items: center; justify-content: center; }
  .nav-menu{
    display: none;
    position: absolute;
    right: 16px;
    top: 64px;
    width: calc(100% - 32px);
    background: rgba(10, 12, 18, 0.92);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 10px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    backdrop-filter: blur(14px);
  }
  .nav-menu.is-open{ display: flex; }
  .nav-menu a{ padding: 12px 12px; }

  .book{ grid-column: span 12; }
  .book-inner{ grid-template-columns: 120px 1fr; }
  .cover{ width: 120px; }
}