/* Tipsboard landing — GitHub Pages (docs/) */

:root {
  --bg-deep: #0c0e12;
  --bg: #12151c;
  --surface: #1a1f2a;
  --surface-2: #222833;
  --border: #2a3140;
  --text: #eef1f5;
  --muted: #9aa3b2;
  --accent: #5cdba4;
  --accent-dim: #3da87e;
  --focus: #9bdcff;
  --radius: 12px;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
  --max: 1120px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-deep);
}

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

a:hover {
  color: #8af0c8;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip:focus {
  position: fixed;
  left: 12px;
  top: 12px;
  width: auto;
  height: auto;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 1000;
}

.wrap {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-deep) 88%, transparent);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.1rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: #0a0c0f;
  border-color: color-mix(in srgb, var(--accent) 70%, #000);
}

.btn-primary:hover {
  background: #7ae9bd;
  color: #0a0c0f;
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Hero */
.hero {
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(3rem, 6vw, 4.5rem);
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(92, 219, 164, 0.12), transparent 55%),
    var(--bg-deep);
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr 1.05fr;
    gap: 3rem;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 36ch;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.badges-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.65rem;
}

.badges-row img {
  height: 22px;
  width: auto;
  display: block;
}

.hero-shot {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--surface);
}

.hero-shot img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

/* Sections */
section {
  padding: clamp(3rem, 6vw, 4.5rem) 0;
}

.section-alt {
  background: var(--bg);
  border-block: 1px solid var(--border);
}

.section-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  letter-spacing: -0.02em;
}

.section-desc {
  margin: 0 0 2rem;
  color: var(--muted);
  max-width: 60ch;
}

/* Pillars */
.pillars {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .pillars {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar {
  padding: 1.35rem 1.4rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.pillar h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.pillar p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Feature cards */
.cards {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  min-height: 100%;
}

.card-body {
  padding: 1.15rem 1.25rem 1.35rem;
  flex: 1;
}

.card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-figure {
  margin: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.card-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 180px;
  object-fit: cover;
  object-position: top center;
}

.wide-figure {
  margin: 2rem 0 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.wide-figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* Steps */
.steps {
  display: grid;
  gap: 1.25rem;
  counter-reset: step;
}

@media (min-width: 800px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  position: relative;
  padding: 1.35rem 1.4rem 1.4rem 1.4rem;
  padding-top: 2.5rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 1rem;
  left: 1.25rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.code {
  margin-top: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.82rem;
  color: #c8d0dc;
  overflow-x: auto;
}

/* CTA band */
.cta-band {
  text-align: center;
  padding: clamp(3rem, 7vw, 4.5rem) 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  border-top: 1px solid var(--border);
}

.cta-band h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
}

.cta-band > .wrap > p {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
}

/* Footer */
.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.footer-logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-meta {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: color-mix(in srgb, var(--muted) 85%, transparent);
}