/* ============================================================
   UnyBase — shared stylesheet (landing + checkout)
   Type: IBM Plex Mono (display) + IBM Plex Sans (body)
   Palette pulled from the UnyBase mark: deep navy + sky blue,
   warm amber as the single bright accent.
   ============================================================ */

:root {
  --ink: #0a1220;
  --ink-2: #0e1c30;
  --panel: #11223b;
  --panel-2: #14273f;
  --panel-border: #22405e;
  --line: #1c3350;
  --navy: #1b3c5d;
  --sky: #5999d5;
  --sky-soft: rgba(89, 153, 213, 0.14);
  --amber: #f0a93e;
  --amber-hover: #ffbf63;
  --paper: #edf2f8;
  --muted: #93a8c2;
  --muted-2: #6d84a0;

  --font-display: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --content-w: 1120px;
  --pad: clamp(20px, 5vw, 64px);
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--content-w);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

p { margin: 0; }

.muted { color: var(--muted); }

.eyebrow-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--sky);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}

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

.btn-amber {
  background: var(--amber);
  color: #1a1200;
}
.btn-amber:hover { background: var(--amber-hover); }

.btn-outline {
  background: transparent;
  border-color: var(--panel-border);
  color: var(--paper);
}
.btn-outline:hover { border-color: var(--sky); color: var(--sky); }

.btn-block { width: 100%; }

.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 18, 32, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link { display: flex; align-items: center; }
.logo-link img { height: 26px; width: auto; display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a.nav-item {
  font-size: 0.95rem;
  color: var(--muted);
  transition: color 0.15s ease;
}
.nav-links a.nav-item:hover { color: var(--paper); }

.header-actions { display: flex; align-items: center; gap: 20px; }

/* Hamburger toggle — hidden by default (desktop), shown at <=860px */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s ease;
}
.nav-toggle:hover { border-color: var(--muted); }
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  background: var(--paper);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: transform 0.2s ease, top 0.2s ease, opacity 0.15s ease;
}
.nav-toggle span { top: 50%; transform: translate(-50%, -50%); }
.nav-toggle span::before { content: ""; top: -6px; }
.nav-toggle span::after  { content: ""; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: translateX(-50%) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { top: 0; transform: translateX(-50%) rotate(-45deg); }

/* Mobile nav sheet — hidden by default, dropped from header when .is-open */
.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  padding: 20px 24px 28px;
  background: rgba(10, 18, 32, 0.98);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
  flex-direction: column;
  gap: 14px;
}
.mobile-nav.is-open { display: flex; }
.mobile-nav .nav-item {
  font-size: 1rem;
  color: var(--paper);
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}
.mobile-nav .nav-item:last-of-type { border-bottom: 0; }
.mobile-nav .btn { margin-top: 6px; text-align: center; }

/* ---------- Hero ---------- */

.hero {
  padding-top: clamp(56px, 9vw, 108px);
  padding-bottom: clamp(56px, 9vw, 108px);
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 3.4rem);
  line-height: 1.08;
}

.hero-sub {
  margin-top: 22px;
  max-width: 46ch;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.hero-secondary-line {
  margin-top: 18px;
  font-size: 0.9rem;
  color: var(--muted-2);
}

/* ---------- Hero stack diagram ---------- */

.stack-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 0;
}

.stack-band {
  --w: 100%;
  width: var(--w);
  max-width: 380px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  border-radius: 8px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--paper);
}

.stack-band span.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sky);
  flex-shrink: 0;
  margin-right: 10px;
}

.stack-band-row { display: flex; align-items: center; }

.stack-base {
  margin-top: 4px;
  width: 100%;
  max-width: 420px;
  background: var(--amber);
  color: #1a1200;
  border: none;
  border-radius: 8px;
  padding: 16px 18px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  letter-spacing: 0.01em;
}

/* ---------- Section rhythm ---------- */

section { padding-top: clamp(56px, 8vw, 100px); padding-bottom: clamp(56px, 8vw, 100px); }

.section-alt { background: var(--ink-2); }

.section-head {
  max-width: 640px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.15rem);
  line-height: 1.18;
}

.section-head p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 62ch;
}

/* ---------- Problem section ---------- */

.problem-body {
  margin-top: 8px;
  max-width: 680px;
  color: var(--muted);
  font-size: 1.05rem;
}

/* ---------- Solution features ---------- */

.feature-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-panel {
  background: var(--ink-2);
  padding: 28px 26px;
}

.section-alt .feature-panel { background: var(--panel); }

.feature-mark {
  width: 34px;
  height: 34px;
  border-radius: 7px;
  border: 1px solid var(--sky);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sky);
  font-family: var(--font-display);
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.feature-panel h3 {
  font-size: 1.02rem;
  font-weight: 600;
  font-family: var(--font-body);
}

.feature-panel p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Pricing ---------- */

.pricing-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.billing-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 4px;
  gap: 4px;
}

.billing-toggle button {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: none;
  border-radius: 999px;
  padding: 9px 16px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.billing-toggle button.is-active {
  background: var(--sky);
  color: #071322;
}

.plan-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.plan-card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  border-radius: 14px;
  padding: 32px;
  display: flex;
  flex-direction: column;
}

.plan-card.is-premium {
  border-color: var(--amber);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
}

.plan-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.plan-for {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.plan-price {
  margin-top: 24px;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
}

.plan-price .amount { font-size: 2.4rem; color: var(--paper); }
.plan-price .cycle { color: var(--muted-2); font-size: 0.9rem; }

.plan-yearly-note {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--sky);
  min-height: 1.2em;
}

.plan-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  flex-grow: 1;
}

.plan-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}
.plan-list li:first-child { border-top: none; }

.plan-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sky);
  margin-top: 8px;
  flex-shrink: 0;
}

.plan-card .btn { margin-top: 28px; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding-top: 40px;
  padding-bottom: 40px;
}

.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-logo img { height: 20px; opacity: 0.9; }

.footer-links { display: flex; gap: 26px; }
.footer-links a { color: var(--muted); font-size: 0.9rem; }
.footer-links a:hover { color: var(--paper); }

.footer-copy { color: var(--muted-2); font-size: 0.82rem; }

/* ---------- Checkout page ---------- */

.checkout-shell {
  min-height: calc(100vh - 76px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px var(--pad);
}

.checkout-card {
  width: 100%;
  max-width: 460px;
}

.checkout-card h1 {
  font-size: clamp(1.6rem, 3.6vw, 2rem);
}

.checkout-sub {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.98rem;
}

.order-summary {
  margin-top: 32px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  border-radius: 14px;
  padding: 26px;
}

.order-summary-label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  color: var(--sky);
}

.order-plan-row {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.order-plan-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.order-plan-desc {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.86rem;
}

.order-summary .billing-toggle { margin-top: 18px; width: 100%; }
.order-summary .billing-toggle button { flex: 1; }

.order-price-row {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.order-price-row .amount {
  font-family: var(--font-display);
  font-size: 1.9rem;
}

.order-price-row .cycle { color: var(--muted-2); font-size: 0.85rem; }

.trust-line {
  margin-top: 20px;
  text-align: center;
  color: var(--muted-2);
  font-size: 0.85rem;
}

.checkout-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 28px;
}
.checkout-back:hover { color: var(--sky); }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-block; }
  .header-actions > .btn { display: none; } /* CTA lives in the mobile menu instead */
  .hero .wrap { grid-template-columns: 1fr; }
  .stack-diagram { margin-top: 8px; }
  .feature-grid { grid-template-columns: 1fr; }
  .plan-grid { grid-template-columns: 1fr; }
  .pricing-head-row { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .site-header .wrap { height: 66px; }
  .order-plan-row { flex-direction: column; align-items: flex-start; gap: 10px; }
}