/* ==========================================================================
   Public site (public_base.html: the landing page and the auth forms).

   Always the light theme (public_base.html pins data-bs-theme), with the
   app's dark ink kept for the hero, the stats bar, the call-to-action band
   and the footer, and lighter tints between them. Loaded after app.css.
   ========================================================================== */
.bk-public {
  --pub-ink:        #1b1d29;   /* the app's dark, from the shelves banner */
  --pub-ink-deep:   #13141d;
  --pub-plum:       #2b2238;
  --pub-violet:     #7239ea;   /* Seven's primary */
  --pub-violet-dk:  #5a26c9;
  --pub-violet-50:  #f1ebfe;
  --pub-gold:       #e9c46a;   /* from the shelves art */
  --pub-teal:       #2a9d8f;
  --pub-paper:      #faf8f4;   /* warm off-white */
  --pub-mist:       #f4f1fb;   /* lavender tint */
  --pub-text:       #1f2233;
  --pub-slate:      #4b5675;
  --pub-line:       #e6e2ee;

  --pub-leaf:       28px 0;    /* the asymmetric card corner */
  --pub-leaf-sm:    16px 0;
  --pub-shadow:     0 1px 2px rgba(27, 29, 41, .05), 0 8px 24px rgba(27, 29, 41, .07);
  --pub-shadow-lg:  0 2px 4px rgba(27, 29, 41, .06), 0 18px 40px rgba(27, 29, 41, .14);
  --pub-gutter:     clamp(16px, 4vw, 32px);

  background: #fff;
  color: var(--pub-text);
  font-size: 1.0625rem;
  line-height: 1.6;
}
.bk-public h1, .bk-public h2, .bk-public h3 { color: var(--pub-ink); letter-spacing: -.01em; }

.pub-container {
  width: 100%;
  max-width: calc(1200px + var(--pub-gutter) * 2);
  margin: 0 auto;
  padding: 0 var(--pub-gutter);
}

/* Buttons: pills ------------------------------------------------------- */
.bk-public .btn.pub-btn {
  border-radius: 50px;
  font-weight: 700;
  padding: .8rem 1.6rem;
  position: relative;
  transition: transform .2s, background-color .2s, color .2s;
}
/* Outlines are drawn on ::after: Seven's `.btn:not(...)` resets strip a
   button's own border and box-shadow, and out-rank anything plain here. */
.bk-public .btn.pub-btn-outline::after,
.bk-public .btn.pub-btn-ghost::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  border: 2px solid currentColor; transition: border-color .2s;
}
.bk-public .btn.pub-btn-ghost::after { border-color: rgba(255, 255, 255, .55); }
.bk-public .btn.pub-btn-ghost:hover::after { border-color: #fff; }
.bk-public .btn.pub-btn:hover { transform: translateY(-1px); }
.bk-public .btn.pub-btn-sm { padding: .5rem 1.15rem; font-size: .95rem; }
.bk-public .btn.pub-btn-primary { background: var(--pub-violet); color: #fff; }
.bk-public .btn.pub-btn-primary:hover { background: var(--pub-violet-dk); color: #fff; }
.bk-public .btn.pub-btn-gold { background: var(--pub-gold); color: var(--pub-ink); }
.bk-public .btn.pub-btn-gold:hover { background: #f0d080; color: var(--pub-ink); }
.bk-public .btn.pub-btn-outline { color: var(--pub-ink); background: transparent; }
.bk-public .btn.pub-btn-outline:hover { background: var(--pub-ink); color: #fff; }
.bk-public .btn.pub-btn-ghost { color: #fff; background: transparent; }
.bk-public .btn.pub-btn-ghost:hover { background: rgba(255, 255, 255, .08); color: #fff; }
/* Solid white on the dark header and hero; deliberately no hover change. */
.bk-public .btn.pub-btn-white,
.bk-public .btn.pub-btn-white:hover,
.bk-public .btn.pub-btn-white:focus,
.bk-public .btn.pub-btn-white:active { background: #fff; color: #000; transform: none; }

/* Header --------------------------------------------------------------- */
.pub-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--pub-line);
}
.pub-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 72px; }
.pub-nav { display: flex; align-items: center; gap: 1.25rem; }
.pub-nav-links { display: flex; gap: .25rem; list-style: none; margin: 0; padding: 0; }
.pub-nav-links a {
  display: block; padding: .45rem .9rem; border-radius: 50px;
  color: var(--pub-ink); font-weight: 600; text-decoration: none;
}
.pub-nav-links a:hover { background: var(--pub-mist); }
.pub-nav-actions { display: flex; gap: .5rem; }
.pub-header-dark { background: #000; border-bottom-color: rgba(255, 255, 255, .08); }
.pub-header-dark .bk-wordmark { filter: brightness(0) invert(1); }
.pub-header-dark .pub-nav-links a { color: rgba(255, 255, 255, .85); }
.pub-header-dark .pub-nav-links a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
@media (max-width: 900px) { .pub-nav-links { display: none; } }
@media (max-width: 420px) { .pub-nav-actions .btn:first-child { display: none; } }

/* Section scaffolding -------------------------------------------------- */
.pub-section { padding: clamp(64px, 8vw, 112px) 0; scroll-margin-top: 72px; }
.pub-section-mist { background: var(--pub-mist); }
.pub-section-paper { background: var(--pub-paper); }
.pub-section-head { max-width: 760px; margin-bottom: 2.75rem; }
.pub-section-head h2 { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.6rem); font-weight: 700; margin: 0 0 .5rem; }
.pub-lead { font-size: clamp(1.05rem, 1rem + .35vw, 1.25rem); color: var(--pub-slate); max-width: 720px; margin: 0; }

.pub-eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700;
  color: var(--pub-violet); margin-bottom: .85rem;
}
.pub-eyebrow::before { content: ""; width: 26px; height: 3px; border-radius: 3px; background: var(--pub-gold); }

/* Hero: the one big dark block ------------------------------------------ */
.pub-hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(110% 130% at 100% 0%, var(--pub-plum) 0%, var(--pub-ink) 50%, var(--pub-ink-deep) 100%);
  padding: clamp(72px, 10vw, 136px) 0 clamp(96px, 12vw, 160px);
}
.pub-hero-art {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  pointer-events: none;
}
/* Ink over the photo: solid enough behind the text, the shelves showing
   through on the right, and a fade into the stats bar at the bottom. */
.pub-hero-art::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, transparent 55%, rgba(17, 18, 28, .7) 100%),
    linear-gradient(90deg, rgba(17, 18, 28, .94) 0%, rgba(27, 29, 41, .82) 40%, rgba(43, 34, 56, .35) 100%);
}
.pub-hero-inner { position: relative; z-index: 1; max-width: 760px; }
.pub-hero h1 {
  color: #fff; font-size: clamp(2.2rem, 1.4rem + 3.2vw, 3.8rem);
  font-weight: 800; letter-spacing: -.02em; line-height: 1.1; margin-bottom: 1.25rem;
}
.pub-hero .pub-lead { color: rgba(255, 255, 255, .82); margin-bottom: 2.25rem; }
.pub-hero .pub-eyebrow { color: var(--pub-gold); }
.pub-actions { display: flex; flex-wrap: wrap; gap: .85rem; }
@media (max-width: 700px) {
  /* Text spans the full width on a phone: darken the whole photo evenly. */
  .pub-hero-art::after { background: rgba(17, 18, 28, .82); }
}

/* Stats bar: dark, overlapping the hero's lower edge -------------------- */
.pub-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin: -64px 0 0; position: relative; z-index: 2;
  background: var(--pub-ink); border-radius: var(--pub-leaf);
  box-shadow: var(--pub-shadow-lg); overflow: hidden;
}
.pub-stat { display: flex; flex-direction: column-reverse; padding: 1.75rem 2rem; border-right: 1px solid rgba(255, 255, 255, .1); margin: 0; }
.pub-stat:last-child { border-right: 0; }
.pub-stat dd { margin: 0; font-size: clamp(2rem, 1.5rem + 1.8vw, 2.9rem); font-weight: 800; color: var(--pub-gold); line-height: 1.1; letter-spacing: -.02em; }
.pub-stat dt { color: rgba(255, 255, 255, .78); font-weight: 500; }
@media (max-width: 640px) {
  .pub-stats { grid-template-columns: 1fr 1fr; }
  .pub-stat { padding: 1.25rem 1.25rem; border-bottom: 1px solid rgba(255, 255, 255, .1); }
  .pub-stat:nth-child(2n) { border-right: 0; }
  .pub-stat:nth-last-child(-n+2):nth-child(2n+1),
  .pub-stat:last-child { border-bottom: 0; }
}

/* Cards ---------------------------------------------------------------- */
.pub-grid { display: grid; gap: 1.5rem; }
.pub-grid-3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.pub-card {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border-radius: var(--pub-leaf); padding: 2rem;
  border: 1px solid var(--pub-line); box-shadow: var(--pub-shadow);
  transition: transform .25s, box-shadow .25s;
}
.pub-card:hover { transform: translateY(-3px); box-shadow: var(--pub-shadow-lg); }
.pub-section-mist .pub-card { border-color: transparent; }
.pub-card h3 { font-size: 1.25rem; font-weight: 700; margin: 0 0 .6rem; }
.pub-card p { color: var(--pub-slate); }
.pub-icon-badge {
  display: inline-grid; place-items: center; width: 56px; height: 56px; flex: none;
  border-radius: 18px 0; background: var(--pub-violet-50); color: var(--pub-violet);
  margin-bottom: 1.35rem;
}
.pub-icon-badge .bk-icon { font-size: 28px; }
.pub-icon-badge.is-gold { background: #fbf2d8; color: #8a6410; }
.pub-icon-badge.is-teal { background: #dff2ef; color: #1d6f65; }

.pub-checklist { list-style: none; padding: 0; margin: auto 0 0; display: grid; gap: .5rem; }
.pub-checklist li { display: flex; gap: .6rem; align-items: flex-start; color: var(--pub-text); font-weight: 500; font-size: .97rem; }
.pub-checklist .bk-icon { color: var(--pub-teal); font-size: 18px; margin-top: .2rem; }

/* How it works --------------------------------------------------------- */
.pub-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 2rem;
             grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.pub-steps li { position: relative; padding-top: 1.5rem; border-top: 2px solid var(--pub-line); }
.pub-steps li::before { content: ""; position: absolute; top: -2px; left: 0; width: 48px; height: 2px; background: var(--pub-violet); }
.pub-step-num { display: block; font-size: .85rem; font-weight: 700; letter-spacing: .1em; color: var(--pub-violet); margin-bottom: .6rem; }
.pub-steps h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: .4rem; }
.pub-steps p { color: var(--pub-slate); margin: 0; }

/* Plans ---------------------------------------------------------------- */
.pub-plan .pub-plan-price { font-size: 2rem; font-weight: 800; color: var(--pub-ink); letter-spacing: -.02em; margin: .25rem 0 .5rem; }
.pub-plan .btn { margin-top: 1.5rem; align-self: flex-start; }
.pub-plan-tag {
  align-self: flex-start; font-size: .78rem; font-weight: 700; padding: .3rem .8rem; border-radius: 50px;
  background: var(--pub-gold); color: var(--pub-ink); margin-bottom: .9rem;
}
.pub-plan.is-featured { background: var(--pub-ink); border-color: var(--pub-ink); }
.pub-plan.is-featured h3, .pub-plan.is-featured .pub-plan-price { color: #fff; }
.pub-plan.is-featured p, .pub-plan.is-featured .pub-checklist li { color: rgba(255, 255, 255, .8); }
.pub-plan.is-featured .pub-checklist .bk-icon { color: var(--pub-gold); }

/* About ---------------------------------------------------------------- */
.pub-about-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.pub-about-grid .pub-section-head { margin-bottom: 0; }
.pub-prose { color: var(--pub-slate); }
.pub-prose p:last-child { margin-bottom: 0; }
.pub-promise {
  margin-top: 1.75rem; padding: 1.25rem 1.5rem; border-radius: var(--pub-leaf-sm);
  background: #fff; border-left: 3px solid var(--pub-gold); color: var(--pub-ink); font-weight: 500;
}
@media (max-width: 860px) { .pub-about-grid { grid-template-columns: 1fr; } }

/* Call to action: dark band -------------------------------------------- */
.pub-cta { position: relative; overflow: hidden; background: var(--pub-ink); color: rgba(255, 255, 255, .82);
           padding: clamp(56px, 7vw, 88px) 0; scroll-margin-top: 72px; }
.pub-cta::after { content: ""; position: absolute; width: 280px; height: 280px; right: -80px; bottom: -130px;
                  border-radius: 140px 0; background: linear-gradient(135deg, var(--pub-violet), transparent); opacity: .4; }
.pub-cta h2 { color: #fff; font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.4rem); margin-bottom: .4rem; }
.pub-cta p { margin: 0; }
.pub-cta-inner { position: relative; z-index: 1; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.75rem; }

/* Footer --------------------------------------------------------------- */
.pub-footer { background: var(--pub-ink-deep); color: rgba(255, 255, 255, .7); padding: 64px 0 0; font-size: .95rem; }
.pub-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2.5rem; padding-bottom: 3rem; }
.pub-footer .bk-wordmark { filter: brightness(0) invert(1); }
.pub-footer-brand p { max-width: 360px; margin-top: 1.25rem; }
.pub-footer-heading { color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; margin-bottom: 1rem; }
.pub-footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: .6rem; }
.pub-footer a { color: rgba(255, 255, 255, .85); text-decoration: none; }
.pub-footer a:hover { color: var(--pub-gold); }
@media (max-width: 760px) { .pub-footer-grid { grid-template-columns: 1fr; } }

/* Auth pages: a white card on the warm paper ---------------------------- */
/* The landing hero's bookcase photo under the same ink, the white card on top. */
.pub-auth-main {
  background:
    linear-gradient(rgba(17, 18, 28, .82), rgba(17, 18, 28, .82)),
    url("../img/hero-books.jpg") center / cover no-repeat,
    var(--pub-ink);
  padding: clamp(40px, 6vw, 80px) 0;
}
.pub-auth-main .bk-auth-card {
  margin: 0 auto; background: #fff; border: 1px solid var(--pub-line);
  border-radius: var(--pub-leaf); box-shadow: var(--pub-shadow-lg); padding: 2.25rem;
}
.bk-auth-invite { padding: 30px 0; margin: 0; }
.pub-auth-main .bk-auth-card .btn-primary { border-radius: 50px; font-weight: 700; padding: .75rem 1.5rem; }
/* Flashes sit above the page's first section, with no gap when there are none. */
.pub-flashes .alert { margin: 1rem 0 0; }
.pub-auth-main .pub-flashes .alert { margin: 0 auto 1.5rem; max-width: 400px; }

html:has(.bk-public) { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html:has(.bk-public) { scroll-behavior: auto; }
  .pub-card, .bk-public .btn.pub-btn { transition: none; }
  .pub-card:hover, .bk-public .btn.pub-btn:hover { transform: none; }
}