/* ============================================================
   Avery Irwin — author site
   Art direction: editorial nonfiction. Cool paper surfaces, deep
   petrol bands, one teal accent. Deliberately kept away from the
   warm bone + crimson serif palette of The Black Quotable so the
   two identities never read as the same publisher.
   Grotesk display, plain sans body.
   ============================================================ */

:root, [data-theme="light"] {
  --color-bg:              #EFF3F1;
  --color-surface:         #F7FAF9;
  --color-surface-2:       #FFFFFF;
  --color-surface-offset:  #E3EAE8;
  --color-surface-offset-2:#D8E2DF;
  --color-divider:         #DCE5E2;
  --color-border:          #C7D4D0;

  --color-text:            #12211F;
  --color-text-muted:      #576764;
  --color-text-faint:      #91A4A0;
  --color-text-inverse:    #EFF3F1;

  --color-primary:         #14605B;
  --color-primary-hover:   #0E4A46;
  --color-primary-active:  #093734;
  --color-primary-highlight:#D2E4E1;

  --color-ink:             #0F2B29;
  --color-ink-2:           #143735;
  --color-ink-text:        #E4EEEB;
  --color-ink-muted:       #93AAA6;
  --color-ink-border:      #234A47;

  --color-gold:            #79C9BE;
  --color-blue:            #2F5C86;

  --radius-sm: 0.25rem;
  --radius-md: 0.4rem;
  --radius-lg: 0.65rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px rgba(40, 32, 20, 0.07);
  --shadow-md: 0 6px 18px rgba(40, 32, 20, 0.09);
  --shadow-lg: 0 18px 44px rgba(40, 32, 20, 0.16);

  --content-narrow: 640px;
  --content-default: 980px;
  --content-wide: 1180px;

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;
  --space-32: 8rem;
}

[data-theme="dark"] {
  --color-bg:              #0C1B1A;
  --color-surface:         #102321;
  --color-surface-2:       #142A28;
  --color-surface-offset:  #122624;
  --color-surface-offset-2:#183230;
  --color-divider:         #1B302E;
  --color-border:          #274643;

  --color-text:            #DEE9E6;
  --color-text-muted:      #8AA09C;
  --color-text-faint:      #5E7370;
  --color-text-inverse:    #0C1B1A;

  --color-primary:         #5FBDB2;
  --color-primary-hover:   #7ACFC5;
  --color-primary-active:  #96DCD3;
  --color-primary-highlight:#193936;

  --color-ink:             #081615;
  --color-ink-2:           #0D201E;
  --color-ink-text:        #DEE9E6;
  --color-ink-muted:       #8AA09C;
  --color-ink-border:      #1E3A38;

  --color-gold:            #79C9BE;
  --color-blue:            #7FA9CE;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.45);
  --shadow-lg: 0 18px 44px rgba(0,0,0,0.55);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
}

img, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

h1, h2, h3 { text-wrap: balance; line-height: 1.12; font-family: var(--font-display); font-weight: 700; letter-spacing: -0.015em; }
p { text-wrap: pretty; }

a { color: var(--color-primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--color-primary-hover); }

::selection { background: var(--color-primary-highlight); color: var(--color-text); }

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

a, button, input { transition: color var(--transition-interactive), background var(--transition-interactive),
                               border-color var(--transition-interactive), box-shadow var(--transition-interactive); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

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

.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-5), 5vw, var(--space-12)); }

/* ---------- shared type ---------- */
.eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.eyebrow-invert { color: var(--color-gold); }
[data-theme="dark"] .eyebrow-invert { color: var(--color-gold); }

.section-title { font-size: var(--text-xl); margin-bottom: var(--space-4); }
.section-head { max-width: 48rem; margin-bottom: var(--space-12); }
.section-sub { color: var(--color-text-muted); max-width: 46rem; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 700;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #F4FAF9; }
.btn-primary:hover { background: var(--color-primary-hover); color: #F4FAF9; }
[data-theme="dark"] .btn-primary { color: #08201E; }
[data-theme="dark"] .btn-primary:hover { color: #08201E; }

.btn-ghost { border-color: var(--color-border); color: var(--color-text); background: transparent; }
.btn-ghost:hover { border-color: var(--color-text-muted); color: var(--color-text); background: var(--color-surface-offset); }

.btn-quiet {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  padding: var(--space-2) 0; text-decoration: underline; text-underline-offset: 3px;
}
.btn-quiet:hover { color: var(--color-text); }
.btn-quiet[hidden] { display: none; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.site-header.is-scrolled { border-bottom-color: var(--color-divider); }

.header-inner { display: flex; align-items: center; gap: var(--space-6); min-height: 4.25rem; }

.brand { display: inline-flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); margin-right: auto; }
.brand-mark { color: var(--color-primary); flex-shrink: 0; }
.brand-name { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em; }

.nav { display: flex; gap: clamp(var(--space-4), 2vw, var(--space-8)); }
.nav a { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); text-decoration: none; }
.nav a:hover { color: var(--color-primary); }

.theme-btn {
  display: grid; place-items: center;
  width: 2.25rem; height: 2.25rem; flex-shrink: 0;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.theme-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }

@media (max-width: 46rem) {
  .header-inner { gap: var(--space-3); }
  .brand-name { display: none; }
  .nav { gap: var(--space-4); }
  .nav a { font-size: var(--text-xs); }
}

/* ---------- hero ---------- */
.hero { padding-block: clamp(var(--space-16), 9vw, var(--space-32)) clamp(var(--space-12), 7vw, var(--space-24)); }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(var(--space-10), 6vw, var(--space-24)); align-items: center;
}
.hero h1 { font-size: var(--text-2xl); letter-spacing: -0.02em; margin-bottom: var(--space-6); max-width: 15ch; }
.lede { font-size: var(--text-base); color: var(--color-text-muted); max-width: 40rem; margin-bottom: var(--space-8); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }

.hero-covers { position: relative; min-height: 22rem; display: grid; place-items: center; }
.cover {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}
.cover-front { position: relative; z-index: 2; width: min(14.5rem, 58%); transform: rotate(-3deg) translateX(-24%); }
.cover-back  { position: absolute; z-index: 1; width: min(13rem, 52%); transform: rotate(5deg) translate(52%, 6%); opacity: .96; }

@media (max-width: 60rem) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-covers { order: -1; min-height: 0; margin-bottom: var(--space-4); }
  .cover-front { width: min(12rem, 46%); }
  .cover-back { width: min(11rem, 42%); }
}

/* ---------- principle strip ---------- */
.strip { border-block: 1px solid var(--color-divider); background: var(--color-surface); }
.strip-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
}
.strip-h { font-family: var(--font-body); font-size: var(--text-sm); font-weight: 700; letter-spacing: 0.02em; margin-bottom: var(--space-3); }
.strip-item p { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ---------- picker ---------- */
.picker-section {
  background: var(--color-ink); color: var(--color-ink-text);
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.picker-section .section-title { color: var(--color-ink-text); }
.picker-section .section-sub { color: var(--color-ink-muted); }

.picker-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(var(--space-10), 6vw, var(--space-24));
  align-items: start;
}
.picker-aside { grid-column: 1; grid-row: 1; position: sticky; top: 6rem; }
.picker-layout > .picker { grid-column: 2; grid-row: 1 / span 2; }
.picker-layout > .picker-note { grid-column: 1; grid-row: 2; }

.picker {
  background: var(--color-ink-2);
  border: 1px solid var(--color-ink-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

@media (max-width: 62rem) {
  .picker-layout { display: flex; flex-direction: column; }
  .picker-aside { position: static; }
  .picker-layout > .picker-note { margin-top: var(--space-8); }
}
.picker-progress { height: 3px; background: var(--color-ink-border); }
.picker-progress-bar { display: block; height: 100%; width: 0%; background: var(--color-gold); transition: width 300ms cubic-bezier(0.16,1,0.3,1); }

.picker-body { padding: clamp(var(--space-6), 4vw, var(--space-10)); }

.q-title { font-family: var(--font-display); font-size: var(--text-lg); color: var(--color-ink-text); margin-bottom: var(--space-6); }

.opts { display: grid; gap: var(--space-3); }
.opt {
  display: block; width: 100%; text-align: left;
  padding: var(--space-4) var(--space-5);
  background: transparent;
  border: 1px solid var(--color-ink-border);
  border-radius: var(--radius-md);
  color: var(--color-ink-text);
  font-size: var(--text-sm); line-height: 1.45;
}
.opt:hover { border-color: var(--color-gold); background: rgba(121,201,190,0.09); }
.opt b { display: block; font-weight: 700; margin-bottom: 2px; }
.opt span { color: var(--color-ink-muted); font-size: var(--text-xs); }

.picker-foot {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-4) clamp(var(--space-6), 4vw, var(--space-10));
  border-top: 1px solid var(--color-ink-border);
}
.picker-foot .btn-quiet { color: var(--color-ink-muted); }
.picker-foot .btn-quiet:hover { color: var(--color-ink-text); }
.picker-count { font-size: var(--text-xs); color: var(--color-ink-muted); margin-left: auto; }

/* result */
.result-kicker { font-size: var(--text-xs); letter-spacing: .14em; text-transform: uppercase; font-weight: 700; color: var(--color-gold); margin-bottom: var(--space-3); }
.result-name { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-ink-text); margin-bottom: var(--space-2); }
.result-maker { font-size: var(--text-xs); color: var(--color-ink-muted); margin-bottom: var(--space-5); }
.result-why { color: var(--color-ink-text); margin-bottom: var(--space-6); font-size: var(--text-sm); }
.result-why strong { color: var(--color-gold); font-weight: 700; }

.runner {
  border-top: 1px solid var(--color-ink-border);
  padding-top: var(--space-6); margin-top: var(--space-2);
}
.runner-h { font-size: var(--text-xs); letter-spacing: .1em; text-transform: uppercase; color: var(--color-ink-muted); font-weight: 700; margin-bottom: var(--space-3); }
.runner-name { font-weight: 700; font-size: var(--text-sm); color: var(--color-ink-text); }
.runner-why { font-size: var(--text-sm); color: var(--color-ink-muted); }

.result-cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-8); }
.result-cta .btn-ghost { border-color: var(--color-ink-border); color: var(--color-ink-text); }
.result-cta .btn-ghost:hover { border-color: var(--color-ink-muted); background: rgba(255,255,255,0.04); color: var(--color-ink-text); }

.picker-note {
  align-self: start;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-ink-border);
  font-size: var(--text-xs); color: var(--color-ink-muted); line-height: 1.65;
  max-width: 32rem;
}

/* ---------- books ---------- */
.books { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }

.book {
  display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
  gap: clamp(var(--space-8), 5vw, var(--space-20));
  align-items: start;
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
  border-top: 1px solid var(--color-divider);
}
.book:last-child { border-bottom: 1px solid var(--color-divider); }

.book-cover img {
  width: 100%; max-width: 20rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.book-kicker { font-size: var(--text-xs); letter-spacing: .14em; text-transform: uppercase; font-weight: 700; margin-bottom: var(--space-3); }
.book-a .book-kicker { color: var(--color-primary); }
.book-b .book-kicker { color: var(--color-blue); }

.book-title { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.book-sub { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-5); font-style: italic; }
.book-copy > p { max-width: 42rem; }

.book-facts { margin: var(--space-6) 0 var(--space-8); display: grid; gap: var(--space-3); max-width: 42rem; }
.book-facts li {
  display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); gap: var(--space-4);
  font-size: var(--text-sm); color: var(--color-text-muted);
  padding-bottom: var(--space-3); border-bottom: 1px solid var(--color-divider);
}
.book-facts li:last-child { border-bottom: 0; padding-bottom: 0; }
.book-facts span { font-size: var(--text-xs); letter-spacing: .08em; text-transform: uppercase; font-weight: 700; color: var(--color-text-faint); padding-top: 2px; }

@media (max-width: 54rem) {
  .book { grid-template-columns: 1fr; }
  .book-cover img { max-width: 11rem; }
  .book-facts li { grid-template-columns: 1fr; gap: var(--space-1); }
}

/* ---------- about ---------- */
.about { background: var(--color-surface); border-top: 1px solid var(--color-divider); padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
.about-grid { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.6fr); gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: start; }
.about-copy p { max-width: 42rem; margin-bottom: var(--space-5); color: var(--color-text-muted); }
.about-lead { font-family: var(--font-display); font-size: var(--text-lg); color: var(--color-text) !important; line-height: 1.4; }
.about-more { font-size: var(--text-sm); color: var(--color-text-faint) !important; margin-bottom: 0 !important; }

@media (max-width: 54rem) { .about-grid { grid-template-columns: 1fr; } }

/* ---------- signup ---------- */
.signup { background: var(--color-ink); color: var(--color-ink-text); padding-block: clamp(var(--space-16), 8vw, var(--space-24)); }
.signup .section-title { color: var(--color-ink-text); }
.signup-inner { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center; }
.signup-copy p { color: var(--color-ink-muted); max-width: 34rem; }
.signup-promise { font-size: var(--text-sm); margin-top: var(--space-4); color: var(--color-ink-muted); }

.field-row { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.signup-form input[type="email"] {
  flex: 1 1 14rem; min-width: 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-ink-2);
  border: 1px solid var(--color-ink-border);
  border-radius: var(--radius-md);
  color: var(--color-ink-text);
  font-size: var(--text-sm);
}
.signup-form input::placeholder { color: var(--color-ink-muted); }
.signup-form input:focus { border-color: var(--color-gold); outline: none; box-shadow: 0 0 0 3px rgba(121,201,190,0.2); }
.form-msg { font-size: var(--text-sm); margin-top: var(--space-4); min-height: 1.5em; color: var(--color-gold); }
.form-msg.is-error { color: #E3B573; }

@media (max-width: 54rem) { .signup-inner { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.site-footer { background: var(--color-bg); border-top: 1px solid var(--color-divider); padding-block: clamp(var(--space-12), 6vw, var(--space-20)) var(--space-8); }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: clamp(var(--space-8), 4vw, var(--space-16)); }
.footer-brand { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; margin-bottom: var(--space-2); }
.footer-note { font-size: var(--text-sm); color: var(--color-text-muted); max-width: 22rem; }
.footer-h { font-family: var(--font-body); font-size: var(--text-xs); letter-spacing: .12em; text-transform: uppercase; font-weight: 700; color: var(--color-text-faint); margin-bottom: var(--space-4); }
.footer-links { display: grid; gap: var(--space-2); }
.footer-links a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--color-primary); text-decoration: underline; }
.footer-mail { font-size: var(--text-sm); font-weight: 500; word-break: break-word; }

.footer-base {
  display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between;
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.footer-base p { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ---------- policy page ---------- */
.policy-h {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: var(--space-10) 0 var(--space-3);
}
.about-copy .policy-h:first-child { margin-top: 0; }