/* ==========================================================================
   Reader Beware — R.L. Stine Book Tracker
   Aesthetic: 90s Goosebumps paperback. Slime green, bumpy black, neon accents.
   ========================================================================== */

:root {
  --slime: #7bff3f;
  --accent: var(--slime);          /* recolored per selected series */
  --bg: #0d0a14;
  --bg2: #17112a;
  --card: #1c1530;
  --ink: #f2eefc;
  --ink-dim: #a99fc4;
  --font-scream: "Creepster", cursive;
  --font-type: "Special Elite", monospace;
  --font-body: "Nunito", system-ui, sans-serif;
}

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

body {
  background:
    radial-gradient(1200px 500px at 50% -10%, #2a1b4d 0%, transparent 60%),
    radial-gradient(900px 400px at 90% 110%, #14260d 0%, transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100vh;
  padding-bottom: 4rem;
}

a { color: var(--accent); }

/* --------------------------------------------------------------- masthead */

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2.2rem clamp(1rem, 4vw, 3rem) 1.2rem;
}

.logo {
  font-family: var(--font-scream);
  font-weight: 400;
  font-size: clamp(3rem, 9vw, 6rem);
  line-height: 0.9;
  letter-spacing: 0.04em;
  color: var(--slime);
  text-transform: uppercase;
  /* embossed + dripping shadow, like the foil logo */
  text-shadow:
    0 1px 0 #b7ff8a,
    0 -1px 0 #2b7a06,
    3px 4px 0 #123302,
    6px 8px 0 rgba(0, 0, 0, .55),
    0 0 28px rgba(123, 255, 63, .35);
  transform: rotate(-2deg);
}

.logo-sub {
  font-family: var(--font-type);
  font-size: clamp(.95rem, 2.2vw, 1.25rem);
  color: var(--ink);
  margin-top: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.tagline {
  font-family: var(--font-type);
  color: var(--ink-dim);
  margin-top: .25rem;
  font-size: .9rem;
}
.tagline em { color: var(--accent); font-style: normal; }

.masthead-side {
  display: grid;
  justify-items: end;
  gap: 1rem;
}
.sync-top {
  color: var(--ink);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, var(--bg2));
}
.sync-top.is-active {
  color: #0d0a14;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 45%, transparent);
}

.masthead-stats {
  display: flex;
  gap: 1.6rem;
  font-family: var(--font-type);
  text-align: center;
}
.masthead-stats .stat b {
  display: block;
  font-family: var(--font-scream);
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: .05em;
}
.masthead-stats .stat span {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--ink-dim);
}

/* ------------------------------------------------------------ series tabs */

.series-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  padding: .8rem clamp(1rem, 4vw, 3rem);
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #ffffff14;
}

.series-tab {
  --tab: var(--slime);
  font-family: var(--font-type);
  font-size: .85rem;
  letter-spacing: .06em;
  color: var(--ink);
  background: var(--bg2);
  border: 2px solid color-mix(in srgb, var(--tab) 45%, transparent);
  border-radius: 999px;
  padding: .5rem 1rem;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
}
.series-tab .count { color: var(--ink-dim); font-size: .75rem; }
.series-tab:hover { transform: translateY(-2px); }
.series-tab.is-active {
  background: color-mix(in srgb, var(--tab) 22%, var(--bg2));
  border-color: var(--tab);
  box-shadow: 0 0 16px color-mix(in srgb, var(--tab) 45%, transparent);
}
.series-tab.is-active .count { color: var(--tab); }

/* ------------------------------------------------------------ series hero */

.series-hero {
  padding: 1.6rem clamp(1rem, 4vw, 3rem) .4rem;
}
.series-hero h2 {
  font-family: var(--font-scream);
  font-weight: 400;
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  color: var(--accent);
  letter-spacing: .05em;
  text-shadow: 2px 3px 0 rgba(0,0,0,.6), 0 0 22px color-mix(in srgb, var(--accent) 40%, transparent);
}
.series-hero .hero-tagline {
  font-family: var(--font-type);
  color: var(--ink-dim);
  margin-top: .35rem;
}
.series-hero .hero-years { color: var(--accent); }

.progress-wrap { margin-top: 1rem; max-width: 560px; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-type);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: .35rem;
}
.progress-label b { color: var(--accent); }
.progress-bar {
  height: 14px;
  border-radius: 999px;
  background: #00000066;
  border: 1px solid #ffffff1c;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--accent) 55%, #000),
    var(--accent));
  box-shadow: 0 0 14px color-mix(in srgb, var(--accent) 70%, transparent);
  transition: width .5s cubic-bezier(.2, .9, .3, 1.2);
}

/* ---------------------------------------------------------------- toolbar */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .8rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
}

.search {
  font-family: var(--font-type);
  font-size: .95rem;
  color: var(--ink);
  background: var(--bg2);
  border: 2px solid #ffffff22;
  border-radius: 999px;
  padding: .55rem 1.1rem;
  min-width: min(280px, 100%);
  outline: none;
}
.search:focus { border-color: var(--accent); box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 40%, transparent); }
.search::placeholder { color: var(--ink-dim); }

.filter-chips, .io-buttons { display: flex; flex-wrap: wrap; gap: .45rem; }
.io-buttons { margin-left: auto; }

.chip {
  font-family: var(--font-type);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--ink-dim);
  background: transparent;
  border: 1.5px solid #ffffff2a;
  border-radius: 999px;
  padding: .42rem .9rem;
  cursor: pointer;
  transition: all .12s ease;
}
.chip:hover { color: var(--ink); border-color: #ffffff55; }
.chip.is-active {
  color: #0d0a14;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}
.chip.io { color: var(--ink); }
.chip:disabled {
  opacity: .45;
  cursor: not-allowed;
  transform: none;
}

/* ------------------------------------------------------------------- grid */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 1.1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
}

.empty-note {
  grid-column: 1 / -1;
  font-family: var(--font-type);
  color: var(--ink-dim);
  text-align: center;
  padding: 3rem 1rem;
}

/* ------------------------------------------------------------------- card */

.card {
  --c: var(--accent);               /* per-book cover color */
  position: relative;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--c) 16%, var(--card)), var(--card) 55%);
  border: 2px solid color-mix(in srgb, var(--c) 55%, #000);
  border-radius: 12px;
  padding: .6rem .6rem .7rem;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover {
  transform: translateY(-4px) rotate(-.4deg);
  box-shadow: 0 10px 24px rgba(0,0,0,.55), 0 0 18px color-mix(in srgb, var(--c) 38%, transparent);
}
.card.is-read { }
.card .num {
  position: absolute;
  top: -10px;
  left: -8px;
  z-index: 2;
  font-family: var(--font-scream);
  font-size: 1rem;
  color: #0d0a14;
  background: var(--c);
  border: 2px solid #0d0a14;
  border-radius: 999px;
  min-width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  padding: 0 .3rem;
  box-shadow: 2px 3px 0 rgba(0,0,0,.55);
  transform: rotate(-8deg);
}

.cover {
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: 7px;
  overflow: hidden;
  background: linear-gradient(160deg, color-mix(in srgb, var(--c) 60%, #111), #0a0812);
  box-shadow: inset 0 0 0 1px #ffffff1f, 0 4px 10px rgba(0,0,0,.5);
}
.cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.05);
}
.card.is-read .cover::after {
  content: "READ";
  position: absolute;
  inset: auto auto 8px -34px;
  transform: rotate(-35deg);
  background: var(--c);
  color: #0d0a14;
  font-family: var(--font-scream);
  font-size: .95rem;
  letter-spacing: .18em;
  padding: .1rem 2.6rem;
  border: 2px solid #0d0a14;
  box-shadow: 0 2px 8px rgba(0,0,0,.6);
}

/* placeholder when no cover art exists */
.cover .no-art {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  padding: .8rem;
  gap: .4rem;
}
.cover .no-art .na-title {
  font-family: var(--font-scream);
  font-size: 1.15rem;
  line-height: 1.05;
  color: var(--c);
  text-shadow: 2px 2px 0 rgba(0,0,0,.8);
}
.cover .no-art .na-author {
  font-family: var(--font-type);
  font-size: .6rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.card h3 {
  font-family: var(--font-body);
  font-weight: 900;
  font-size: .86rem;
  line-height: 1.2;
  min-height: 2.1em;
}
.card .year {
  font-family: var(--font-type);
  font-size: .68rem;
  color: var(--ink-dim);
  letter-spacing: .1em;
}

/* stars */
.stars { display: flex; gap: .1rem; }
.stars button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: .95rem;
  line-height: 1;
  padding: 0 .05rem;
  color: #4a4363;
  transition: color .1s ease, transform .1s ease;
}
.stars button:hover { transform: scale(1.25); }
.stars button.on { color: var(--c); text-shadow: 0 0 8px color-mix(in srgb, var(--c) 60%, transparent); }

/* card action toggles */
.card-actions { display: flex; gap: .4rem; margin-top: auto; }
.toggle {
  flex: 1;
  font-family: var(--font-type);
  font-size: .68rem;
  letter-spacing: .08em;
  padding: .38rem 0;
  border-radius: 7px;
  border: 1.5px solid #ffffff26;
  background: #00000040;
  color: var(--ink-dim);
  cursor: pointer;
  transition: all .12s ease;
}
.toggle:hover { border-color: color-mix(in srgb, var(--c) 70%, #fff); color: var(--ink); }
.toggle.on {
  background: var(--c);
  border-color: var(--c);
  color: #0d0a14;
  font-weight: 700;
  box-shadow: 0 0 10px color-mix(in srgb, var(--c) 50%, transparent);
}

/* ----------------------------------------------------------------- footer */

.footer {
  padding: 2.5rem clamp(1rem, 4vw, 3rem) 0;
  font-size: .82rem;
  color: var(--ink-dim);
  text-align: center;
  line-height: 1.7;
}

/* ------------------------------------------------------------------ modal */

.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(8, 5, 15, .72);
  backdrop-filter: blur(6px);
}
.modal[hidden] { display: none; }
.modal-panel {
  position: relative;
  width: min(520px, 100%);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, var(--card)), var(--card) 60%);
  border: 2px solid color-mix(in srgb, var(--accent) 48%, #000);
  border-radius: 12px;
  padding: 1.4rem;
  box-shadow: 0 24px 70px rgba(0,0,0,.68), 0 0 24px color-mix(in srgb, var(--accent) 24%, transparent);
}
.modal-panel h2 {
  font-family: var(--font-scream);
  font-weight: 400;
  font-size: 2.2rem;
  letter-spacing: .05em;
  color: var(--accent);
  text-shadow: 2px 3px 0 rgba(0,0,0,.6);
}
.modal-close {
  position: absolute;
  top: .75rem;
  right: .75rem;
  width: 2rem;
  height: 2rem;
  border: 1.5px solid #ffffff2a;
  border-radius: 999px;
  background: #00000030;
  color: var(--ink);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
}
.sync-copy,
.sync-status,
.account-status,
.shelf-fallback {
  font-family: var(--font-type);
  color: var(--ink-dim);
  font-size: .78rem;
  line-height: 1.6;
}
.sync-copy { margin-top: .25rem; }
.account-box {
  margin-top: 1rem;
  padding: .9rem;
  border: 1.5px solid #ffffff1f;
  border-radius: 9px;
  background: #00000024;
}
.account-status { color: var(--ink); }
.shelf-fallback {
  margin-top: .85rem;
  border-top: 1px solid #ffffff1f;
  padding-top: .75rem;
}
.shelf-fallback summary {
  cursor: pointer;
  color: var(--ink-dim);
}
.shelf-fallback[open] summary { color: var(--ink); }
.sync-field {
  display: grid;
  gap: .35rem;
  margin-top: 1rem;
  font-family: var(--font-type);
  color: var(--ink-dim);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.sync-field input {
  width: 100%;
  font-family: var(--font-type);
  font-size: .95rem;
  letter-spacing: .04em;
  text-transform: lowercase;
  color: var(--ink);
  background: #00000042;
  border: 2px solid #ffffff22;
  border-radius: 9px;
  padding: .7rem .85rem;
  outline: none;
}
.sync-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 35%, transparent);
}
.sync-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: .85rem;
}
.sync-status { margin-top: .8rem; min-height: 1.6em; }

/* ------------------------------------------------------------------ toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  transform: translate(-50%, 200%);
  background: var(--accent);
  color: #0d0a14;
  font-family: var(--font-type);
  font-weight: 700;
  padding: .7rem 1.4rem;
  border-radius: 999px;
  border: 2px solid #0d0a14;
  box-shadow: 0 8px 24px rgba(0,0,0,.6);
  transition: transform .25s cubic-bezier(.2, .9, .3, 1.2);
  z-index: 50;
}
.toast.show { transform: translate(-50%, 0); }

/* ---------------------------------------------------------------- mobile */

@media (max-width: 560px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(136px, 1fr)); gap: .8rem; }
  .masthead { padding-top: 1.4rem; }
  .masthead-side { width: 100%; justify-items: stretch; }
  .sync-top { width: 100%; text-align: center; }
  .masthead-stats { width: 100%; justify-content: space-between; }
  .io-buttons { margin-left: 0; }
}