/* ============================================================
   KHEN — Checkout / pricing (Apple × Zelt hybrid)
   Source: work/KhenSwiftUI/DESIGN.md
   Tokens: ./tokens.css
   ============================================================ */
@import "./tokens.css";

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--canvas);
  color-scheme: light;
  transition: background-color 280ms var(--ease), color 280ms var(--ease);
}
html[data-theme="dark"] { color-scheme: dark; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.47;
  letter-spacing: -0.2px;
  font-feature-settings: "ss03";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: opacity 320ms var(--ease), background-color 280ms var(--ease), color 280ms var(--ease);
}

.pricing-card,
.checkout-summary,
.checkout-cta,
#submit {
  transition: background-color 280ms var(--ease), color 280ms var(--ease), border-color 280ms var(--ease), box-shadow 280ms var(--ease), transform 120ms var(--press);
}

body > main {
  padding: 0;
}

.checkout-pricing { margin-inline: 0; }

body.is-page-exit, body.is-leaving { opacity: 0; pointer-events: none; }

::selection { background: var(--blue); color: var(--on-blue); }

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

a { color: var(--ink); text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; padding: 0; cursor: pointer; }

button:active, .checkout-cta:active, .checkout-back:active, #submit:active {
  transform: scale(0.95);
}

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

/* ========== Layout ========== */

.checkout-pricing {
  width: 100%;
  max-width: none;
  min-height: 100vh;
  display: grid;
  gap: 0;
}

.pricing-intro {
  text-align: center;
  display: grid;
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
}

.pricing-eyebrow {
  font-family: var(--font-text);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.2px;
  font-weight: 600;
  color: var(--neutral);
  margin: 0;
  text-transform: none;
}

.pricing-intro h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 84px);
  line-height: 1.05;
  letter-spacing: -1.5px;
  font-weight: 300;
  color: var(--ink);
  margin: 0;
}

.pricing-lead {
  font-family: var(--font-text);
  font-size: 19px;
  line-height: 1.5;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--ink);
  margin: 0 auto;
  max-width: 44ch;
}

/* ========== Pricing card — feature-card grammar ========== */

.pricing-card {
  position: relative;
  max-width: none;
  margin: 0;
  width: 100%;
  min-height: 100vh;
  padding: clamp(48px, 5vw, 72px) clamp(24px, 4vw, 56px) 72px;
  background: var(--canvas);
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.pricing-page-back {
  position: absolute;
  top: 16px;
  left: 16px;
  font-family: var(--font-text);
  font-size: 14px;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 10px;
  border-radius: var(--r-xs);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: underline;
  text-decoration-color: var(--primary);
  text-underline-offset: 3px;
}
.pricing-page-back::before { content: "‹"; font-size: 18px; line-height: 1; text-decoration: none; }
.pricing-page-back:hover { text-decoration-color: var(--primary-focus); }

.pricing-details { display: grid; gap: 16px; }

.plan-name {
  font-family: var(--font-text);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.2px;
  font-weight: 600;
  color: var(--neutral);
  text-transform: none;
  margin: 0;
}

.price {
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 84px);
  line-height: 1.0;
  letter-spacing: -2px;
  font-weight: 300;
  color: var(--ink);
  margin: 0;
}

.price span {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.2px;
  color: var(--neutral);
  margin-left: 6px;
}

.price-trial {
  display: inline-flex;
  align-items: center;
  align-self: start;
  width: max-content;
  font-family: var(--font-text);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.2px;
  font-weight: 600;
  color: var(--on-primary);
  padding: 6px 12px;
  border: 2px solid var(--primary);
  border-radius: var(--r-xs);
  background: var(--primary);
  margin: 0;
  text-transform: uppercase;
}

.plan-copy {
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.2px;
  font-weight: 500;
  color: var(--ink);
  margin: 4px 0 0;
  max-width: 44ch;
}

.plan-features {
  list-style: none;
  padding: 0;
  margin: 16px 0 8px;
  display: grid;
  gap: 8px;
}
.plan-features li {
  position: relative;
  padding-left: 26px;
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.2px;
  font-weight: 500;
  color: var(--ink);
}
.plan-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 6px;
  border-left: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(-45deg);
}

/* Near-square brand sky-blue CTA */
.checkout-cta,
#submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 27px;
  border-radius: var(--r-xs);
  background: var(--blue);
  color: var(--on-blue);
  font-family: var(--font-text);
  font-size: 16px;
  letter-spacing: 0;
  font-weight: 600;
  text-align: center;
  border: 2px solid var(--blue);
  cursor: pointer;
  min-height: 44px;
  margin-top: 8px;
  transition: background 200ms var(--ease), border-color 200ms var(--ease), transform 120ms var(--press);
}
.checkout-cta:hover, #submit:hover {
  background: var(--blue-focus);
  border-color: var(--blue-focus);
  color: var(--on-blue);
}
.checkout-cta:disabled, #submit:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* ========== Checkout panel ========== */

.checkout-panel { display: block; }
.checkout-panel.hidden { display: none; }

.checkout-panel-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 20px;
}

.checkout-back {
  font-family: var(--font-text);
  font-size: 14px;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 10px;
  border-radius: var(--r-xs);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--blue);
  text-underline-offset: 3px;
}
.checkout-back::before { content: "‹"; font-size: 18px; line-height: 1; }
.checkout-back:hover { text-decoration-color: var(--blue-focus); }

.checkout-desktop {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.4fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  width: 100%;
  max-width: none;
}

.checkout-summary {
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background: var(--surface);
  display: grid;
  gap: 12px;
  position: sticky;
  top: 24px;
}
.checkout-summary .price { font-size: 48px; letter-spacing: -1.5px; }
.checkout-summary .plan-copy { margin-top: 4px; }

/* Match pricing-plan colors (size unchanged) */
.checkout-summary .plan-name {
  color: var(--ink-muted-48);
}
.checkout-summary .price span {
  color: var(--ink-muted-48);
}
.checkout-summary .price-trial {
  display: block;
  width: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--blue);
  font-size: 13px;
  letter-spacing: 0.6px;
  line-height: 1.3;
}
.checkout-summary .plan-copy {
  color: var(--ink-muted-80);
}
.checkout-summary .plan-features li::before {
  width: 7px;
  height: 7px;
  top: 0.55em;
  border: 0;
  border-radius: 1px;
  background: var(--blue);
  transform: none;
}

#payment-form { display: grid; gap: 20px; }

#payment-element {
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-xs);
  padding: 12px;
  background: var(--canvas);
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(18, 23, 24, 0.25);
  border-top-color: var(--on-primary);
  animation: spin 900ms linear infinite;
}
.spinner.hidden { display: none; }

@keyframes spin { to { transform: rotate(360deg); } }

#payment-message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline);
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 500;
  text-align: center;
}
#payment-message.hidden { display: none; }

.hidden { display: none !important; }

@media (max-width: 833px) {
  .checkout-desktop { grid-template-columns: 1fr; gap: 20px; }
  .checkout-summary { position: static; }
  .pricing-card { padding: 56px 20px 48px; }
  .pricing-page-back { top: 12px; left: 12px; }
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}
.theme-toggle--float {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
  background: #ffffff;
  color: #121718;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}
html[data-theme="dark"] .theme-toggle--float {
  background: #ffffff;
  color: #121718;
}
.theme-toggle-icon { width: 18px; height: 18px; display: none; }
html:not([data-theme="dark"]) .theme-toggle-icon--moon { display: block; }
html[data-theme="dark"] .theme-toggle-icon--sun { display: block; }