/* =========================================================
   Nooklo — site styles
   Light = warm cream  ·  Dark = espresso
   ========================================================= */

:root {
  --bg:        #FAF5EB;
  --bg-elev:   #F2EAD9;
  --ink:       #1A1410;
  --ink-soft:  #5A4B3F;
  --ink-mute:  #8C7B6B;
  --accent:    #D4824F;
  --accent-2:  #8FA68C;
  --line:      rgba(26, 20, 16, 0.10);
  --shadow:    0 30px 60px -30px rgba(26, 20, 16, 0.25);
  --radius:    18px;
  --serif:     'Fraunces', Georgia, 'Times New Roman', serif;
  --sans:      'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
  --mono:      'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

[data-theme="dark"] {
  --bg:        #1A1410;
  --bg-elev:   #241B16;
  --ink:       #F2EAD9;
  --ink-soft:  #C9B89F;
  --ink-mute:  #8C7B6B;
  --accent:    #D4824F;
  --accent-2:  #8FA68C;
  --line:      rgba(242, 234, 217, 0.10);
  --shadow:    0 30px 60px -30px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.005em;
  transition: background 250ms ease, color 250ms ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }
em, i { font-style: italic; font-family: var(--serif); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow    { max-width: 720px;  margin: 0 auto; padding: 0 24px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand {
  font-family: var(--serif); font-size: 26px; font-weight: 500;
  letter-spacing: -0.02em; line-height: 1;
}
.brand-dot { color: var(--accent); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  font-size: 14px; color: var(--ink-soft); font-weight: 500;
}
.nav-links a:hover { color: var(--ink); }
.theme-toggle {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: 999px; width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--ink-soft);
  transition: all 200ms ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .sun  { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg); color: var(--ink);
  padding: 12px 20px; border-radius: 999px;
  font-size: 14px; font-weight: 600; letter-spacing: -0.005em;
  border: 1px solid var(--line); cursor: pointer;
  transition: transform 150ms ease, opacity 150ms ease, border-color 150ms ease;
}
.btn:hover { color: var(--ink); opacity: 1; transform: translateY(-1px); border-color: var(--ink); }
.btn-ghost {
  background: transparent; color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink); }

/* ---------- typography ---------- */
.eyebrow {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
}
h1, h2, h3, h4 {
  font-family: var(--serif); color: var(--ink);
  font-weight: 500; letter-spacing: -0.025em; line-height: 1.08;
}
h1 { font-size: clamp(40px, 6.5vw, 76px); letter-spacing: -0.035em; }
h2 { font-size: clamp(32px, 4.5vw, 52px); }
h3 { font-size: clamp(20px, 2.2vw, 26px); line-height: 1.25; }
p  { color: var(--ink-soft); font-size: 17px; }
.lead { font-size: clamp(18px, 2vw, 22px); color: var(--ink-soft); line-height: 1.5; }

section { padding: 96px 0; }
@media (max-width: 720px) { section { padding: 64px 0; } }

/* ---------- hero ---------- */
.hero {
  padding: 64px 0 80px;
  background:
    radial-gradient(900px 500px at 80% -20%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%),
    radial-gradient(700px 500px at 10% 110%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 60%);
}
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 56px; align-items: center;
}
.hero h1 em { color: var(--ink); }
.hero p.lead { margin: 24px 0 32px; max-width: 540px; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-meta {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-mute); margin-top: 24px;
}
.phone-frame {
  position: relative;
  display: flex; justify-content: center; align-items: center;
}
.phone-frame .device {
  position: relative;
  display: inline-block;
  line-height: 0;
}
.phone-frame .device::before {
  content: "";
  position: absolute;
  top: 1.5%;
  left: 50%;
  transform: translateX(-50%);
  width: 32%;
  aspect-ratio: 125 / 37;
  background: #000;
  border-radius: 999px;
  z-index: 2;
  pointer-events: none;
}
.phone-frame img {
  max-width: 320px; width: 100%;
  border-radius: 38px;
  box-shadow: var(--shadow);
}
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .phone-frame img { max-width: 280px; }
}

/* ---------- problem section ---------- */
.problem-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  margin-top: 48px;
}
.problem-card {
  padding: 28px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-elev);
}
.problem-card .num {
  font-family: var(--mono); color: var(--accent);
  font-size: 12px; letter-spacing: 0.1em; margin-bottom: 12px;
}
.problem-card p { font-size: 15px; line-height: 1.5; }
@media (max-width: 880px) {
  .problem-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .problem-grid { grid-template-columns: 1fr; }
}

/* ---------- how it works ---------- */
.steps { display: flex; flex-direction: column; gap: 120px; margin-top: 64px; }
.step {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
}
.step:nth-child(even) .step-copy { order: 2; }
.step-num {
  font-family: var(--serif); font-style: italic;
  color: var(--accent); font-size: 18px; margin-bottom: 8px;
}
.step h3 { margin-bottom: 16px; font-size: clamp(24px, 2.6vw, 32px); }
.step p { max-width: 460px; font-size: 17px; }
.step .phone-frame img { max-width: 300px; }
@media (max-width: 880px) {
  .step { grid-template-columns: 1fr; gap: 32px; }
  .step:nth-child(even) .step-copy { order: 0; }
  .steps { gap: 80px; }
}

/* ---------- three screens ---------- */
.screens-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px; margin-top: 56px;
}
.screen-card { text-align: center; }
.screen-card .label {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.14em; color: var(--ink-mute);
  text-transform: uppercase; margin-bottom: 16px;
}
.screen-card h4 {
  font-family: var(--serif); font-weight: 500;
  font-size: 22px; margin: 20px 0 12px;
}
.screen-card p { font-size: 15px; max-width: 280px; margin: 0 auto; }
.screen-card .phone-frame img { max-width: 260px; }
@media (max-width: 880px) {
  .screens-grid { grid-template-columns: 1fr; gap: 56px; }
}

/* ---------- feature blocks ---------- */
.feature {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  margin-top: 80px;
}
.feature.reverse .feature-copy { order: 2; }
.feature .phone-frame img { max-width: 280px; }
@media (max-width: 880px) {
  .feature { grid-template-columns: 1fr; gap: 32px; }
  .feature.reverse .feature-copy { order: 0; }
}

/* ---------- guides ---------- */
.guides-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; margin-top: 48px;
}
.guide-card {
  padding: 32px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-elev);
  transition: transform 200ms ease, border-color 200ms ease;
}
.guide-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.guide-card h3 {
  font-size: 22px; margin-bottom: 12px; font-weight: 500;
}
.guide-card p { font-size: 15px; }
.guide-card a.read-more {
  display: inline-block; margin-top: 18px;
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.08em; color: var(--accent);
}
@media (max-width: 720px) {
  .guides-grid { grid-template-columns: 1fr; }
}

/* ---------- FAQ ---------- */
.faq-list { margin-top: 40px; border-top: 1px solid var(--line); }
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 0; cursor: pointer; gap: 24px;
  font-family: var(--serif); font-weight: 500; font-size: 20px;
  letter-spacing: -0.02em; color: var(--ink);
  list-style: none;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q::after {
  content: '+'; font-family: var(--mono); font-size: 22px;
  color: var(--accent); transition: transform 200ms ease;
  font-weight: 300;
}
details[open] .faq-q::after { content: '–'; }
.faq-a {
  padding: 0 0 24px 0; max-width: 640px;
  color: var(--ink-soft); font-size: 16px; line-height: 1.6;
}

/* ---------- CTA ---------- */
.cta {
  text-align: center;
  background: var(--bg-elev);
  margin: 0 24px 96px;
  border-radius: 32px;
  padding: 80px 24px;
}
.cta h2 { margin-bottom: 16px; }
.cta p.lead { margin: 0 auto 32px; max-width: 480px; }
.cta .hero-meta { margin-top: 28px; }
@media (max-width: 720px) {
  .cta { margin: 0 0 64px; border-radius: 0; padding: 64px 24px; }
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 64px;
}
.footer-grid {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 24px;
}
.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a { font-size: 14px; color: var(--ink-soft); }
.footer-tag {
  font-family: var(--serif); font-style: italic;
  color: var(--ink-mute); font-size: 14px;
}

/* ---------- blog ---------- */
.post {
  padding: 80px 0 96px;
  max-width: 720px; margin: 0 auto;
}
.post .container, .post { padding-left: 24px; padding-right: 24px; }
.post-meta {
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-mute); letter-spacing: 0.08em;
  text-transform: uppercase; margin-bottom: 16px;
}
.post h1 { font-size: clamp(36px, 5vw, 56px); margin-bottom: 24px; }
.post .lead { margin-bottom: 32px; }
.post h2 {
  font-size: 28px; margin: 48px 0 16px;
  font-weight: 500;
}
.post h3 {
  font-size: 22px; margin: 32px 0 12px;
}
.post p, .post ul, .post ol { margin-bottom: 20px; color: var(--ink-soft); }
.post ul, .post ol { padding-left: 24px; }
.post li { margin-bottom: 8px; }
.post blockquote {
  margin: 32px 0; padding: 24px 28px;
  border-left: 3px solid var(--accent);
  background: var(--bg-elev);
  font-family: var(--serif); font-style: italic;
  font-size: 19px;
  color: var(--ink);
}
.post a { color: var(--accent); border-bottom: 1px solid var(--accent); }
.post a:hover { opacity: 0.7; }
.post hr {
  border: none; border-top: 1px solid var(--line);
  margin: 48px auto; max-width: 80px;
}
.post-cta {
  margin-top: 56px; padding: 32px;
  background: var(--bg-elev); border-radius: var(--radius);
  text-align: center;
}
.post-cta p { margin-bottom: 16px; }

/* ---------- generic page ---------- */
.page-head {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--line);
}
.page-head h1 { font-size: clamp(40px, 5vw, 60px); }
.page-head .lead { margin-top: 16px; }
.page-body { padding: 56px 0 96px; }
.page-body h2 { font-size: 26px; margin: 40px 0 12px; }
.page-body p, .page-body ul, .page-body ol { margin-bottom: 16px; color: var(--ink-soft); }
.page-body ul, .page-body ol { padding-left: 24px; }

/* ---------- blog index ---------- */
.post-list { margin-top: 48px; }
.post-list-item {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  display: block;
}
.post-list-item h3 {
  font-size: 26px; margin-bottom: 8px;
  transition: color 150ms ease;
}
.post-list-item:hover h3 { color: var(--accent); }
.post-list-item p { font-size: 16px; }

/* utility */
.text-italic { font-family: var(--serif); font-style: italic; }