/* =========================================================================
   ReviewFlow — Marketing landing page
   ========================================================================= */

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

.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-standard),
              background-color var(--dur-base) var(--ease-standard);
}
.site-header[data-stuck="true"] { border-bottom-color: var(--rule); }

.site-header__inner {
  display: flex; align-items: center; gap: var(--s-5);
  min-block-size: 4.5rem;
}

.brand {
  display: inline-flex; align-items: center; gap: 0.625rem;
  white-space: nowrap;
  text-decoration: none; font-weight: 580;
  letter-spacing: var(--ls-tight);
  font-size: var(--fs-md);
  margin-inline-end: auto;
}
.brand__glyph {
  inline-size: 1.625rem; block-size: 1.625rem;
  border-radius: var(--r-xs);
  background: var(--accent);
  display: grid; place-items: center;
  color: var(--text-on-accent);
  flex: none;
}
.brand__glyph svg { inline-size: 1rem; block-size: 1rem; }

.nav { display: none; gap: var(--s-5); align-items: center; }
@media (min-width: 60rem) { .nav { display: flex; } }
.nav a {
  text-decoration: none;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  padding-block: 0.25rem;
  position: relative;
  transition: color var(--dur-quick) var(--ease-standard);
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  block-size: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-entrance);
}
.nav a:hover { color: var(--text-primary); }
.nav a:hover::after { transform: scaleX(1); }

.header__actions { display: flex; align-items: center; gap: var(--s-3); }
.header__actions .btn--quiet { display: none; }
@media (min-width: 48rem) { .header__actions .btn--quiet { display: inline-flex; } }

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

.hero {
  position: relative;
  padding-block: clamp(3rem, 2rem + 5vw, 6.5rem) clamp(3.5rem, 2rem + 6vw, 7rem);
  overflow: clip;
}
.hero__grid {
  display: grid;
  gap: clamp(2.5rem, 1rem + 6vw, 4.5rem);
  align-items: center;
}
@media (min-width: 64rem) {
  .hero__grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); }
}

.hero__title { margin-block: var(--s-4) 0; }
.hero__title em {
  font-style: italic;
  font-variation-settings: "SOFT" 40, "WONK" 1, "opsz" 120;
  color: var(--accent);
}
.hero__lede { margin-top: var(--s-5); }

.hero__cta {
  display: flex; flex-wrap: wrap; gap: var(--s-3);
  margin-top: var(--s-6);
}

.hero__proof {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: var(--s-3) var(--s-5);
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--rule);
}
.proof-stat { display: flex; flex-direction: column; gap: 2px; }
.proof-stat__value {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  letter-spacing: var(--ls-tight);
  font-variant-numeric: tabular-nums;
}
.proof-stat__label {
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--text-muted);
}

/* Timer motif: the "20 seconds" promise, drawn as a ring. */
.promise {
  display: inline-flex; align-items: center; gap: var(--s-3);
  padding: 0.375rem 0.875rem 0.375rem 0.4375rem;
  border: 1px solid var(--rule-accent);
  background: var(--accent-quiet);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  color: var(--accent-text);
  font-weight: 520;
}
.promise__ring { inline-size: 1.25rem; block-size: 1.25rem; flex: none; }
.promise__ring circle { fill: none; stroke-width: 2.5; }
.promise__ring .track { stroke: color-mix(in srgb, var(--accent) 25%, transparent); }
.promise__ring .arc {
  stroke: var(--accent); stroke-linecap: round;
  stroke-dasharray: 50.26; stroke-dashoffset: 50.26;
  transform: rotate(-90deg); transform-origin: center;
  animation: ring-fill 3.2s var(--ease-standard) 0.4s forwards;
}
@keyframes ring-fill { to { stroke-dashoffset: 6; } }

/* ----- Hero stage (Three.js canvas + fallback) ------------------------- */

.stage {
  position: relative;
  aspect-ratio: 1 / 1;
  inline-size: 100%;
  max-inline-size: 34rem;
  /* justify-self, not auto margins: an auto margin on a grid item makes it
     shrink to content, and this box has only absolutely-positioned children. */
  justify-self: center;
  border-radius: var(--r-lg);
  background:
    radial-gradient(ellipse 70% 60% at 50% 42%,
      color-mix(in srgb, var(--accent) 12%, transparent) 0%,
      transparent 70%),
    var(--surface-sunken);
  border: 1px solid var(--rule);
  overflow: hidden;
  isolation: isolate;
}
.stage__canvas { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; }
.stage__fallback {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  padding: var(--s-6);
}
.stage[data-3d="on"] .stage__fallback { display: none; }

/* Static 2D stand — shown when WebGL/reduced-motion/small screens decline 3D. */
.stand-flat {
  inline-size: min(17rem, 64%);
  filter: drop-shadow(0 24px 40px color-mix(in srgb, var(--ink) 28%, transparent));
}

.stage__caption {
  position: absolute; left: var(--s-4); bottom: var(--s-4);
  display: flex; align-items: center; gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  padding: 0.3125rem 0.5rem;
  border-radius: var(--r-xs);
  backdrop-filter: blur(4px);
}

/* ----- Section headers ------------------------------------------------- */

.section-head {
  display: grid; gap: var(--s-4);
  max-inline-size: 60rem;
  margin-bottom: clamp(2.5rem, 1.5rem + 3vw, 4rem);
}
.section-head__row {
  display: flex; align-items: baseline; gap: var(--s-4);
  padding-bottom: var(--s-4);
  border-bottom: 1px solid var(--rule);
}
.section-head__row .h2 { flex: 1; }

/* ----- 01 · How it works (receipt strip) ------------------------------- */

.steps {
  display: grid; gap: 0;
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: var(--surface-raised);
  overflow: hidden;
}
@media (min-width: 56rem) { .steps { grid-template-columns: repeat(3, 1fr); } }

.step {
  position: relative;
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  display: grid; gap: var(--s-3);
  align-content: start;
  border-bottom: 1px dashed var(--rule-strong);
}
.step:last-child { border-bottom: 0; }
@media (min-width: 56rem) {
  .step { border-bottom: 0; border-right: 1px dashed var(--rule-strong); }
  .step:last-child { border-right: 0; }
}
.step__index {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.step__title { font-size: var(--fs-lg); font-weight: 560; letter-spacing: var(--ls-tight); }
.step__body { color: var(--text-secondary); font-size: var(--fs-base); line-height: var(--lh-relaxed); }
.step__timing {
  margin-top: var(--s-2);
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--text-muted);
}

/* ----- 02 · Features (asymmetric editorial grid) ----------------------- */

.features { display: grid; gap: var(--s-4); }
@media (min-width: 52rem) { .features { grid-template-columns: repeat(6, 1fr); } }

.feature {
  grid-column: span 6;
  padding: clamp(1.5rem, 1rem + 1.5vw, 2rem);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: var(--surface-raised);
  display: grid; gap: var(--s-3); align-content: start;
  transition: border-color var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-standard);
}
.feature:hover { border-color: var(--rule-strong); }
@media (min-width: 52rem) {
  .feature--wide { grid-column: span 4; }
  .feature--half { grid-column: span 3; }
  .feature--third { grid-column: span 2; }
}
.feature__icon {
  inline-size: 2.25rem; block-size: 2.25rem;
  display: grid; place-items: center;
  border-radius: var(--r-sm);
  border: 1px solid var(--rule-accent);
  background: var(--accent-quiet);
  color: var(--accent-text);
}
.feature__icon svg { inline-size: 1.125rem; block-size: 1.125rem; }
.feature__title { font-size: var(--fs-md); font-weight: 560; letter-spacing: var(--ls-tight); }
.feature__body { color: var(--text-secondary); font-size: var(--fs-sm); line-height: var(--lh-relaxed); }

.feature--accent {
  background: var(--panel-bg);
  border-color: var(--panel-bd, var(--panel-bg));
  color: var(--panel-fg);
}
.feature--accent .feature__body { color: var(--panel-fg-dim); }
.feature--accent .feature__icon {
  border-color: color-mix(in srgb, #F2EBDF 26%, transparent);
  background: color-mix(in srgb, #F2EBDF 8%, transparent);
  color: var(--clay-300);
}

/* ----- 03 · Stand showcase --------------------------------------------- */

.showcase {
  display: grid; gap: clamp(2rem, 1rem + 4vw, 4rem);
  align-items: center;
}
@media (min-width: 62rem) { .showcase { grid-template-columns: 1fr 1fr; } }

.showcase__media {
  position: relative;
  border-radius: var(--r-lg);
  background:
    linear-gradient(160deg,
      color-mix(in srgb, var(--ink) 96%, var(--accent)) 0%,
      var(--ink-900) 60%);
  padding: clamp(2rem, 1rem + 4vw, 3.5rem);
  display: grid; place-items: center;
  min-block-size: 22rem;
  overflow: hidden;
}
.showcase__media::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 30%,
    color-mix(in srgb, var(--clay-500) 26%, transparent), transparent 70%);
}
.showcase__specs {
  display: grid; gap: 0;
  margin-top: var(--s-5);
  border-top: 1px solid var(--rule);
}
.spec {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s-4);
  padding-block: 0.8125rem;
  border-bottom: 1px solid var(--rule);
  font-size: var(--fs-sm);
}
.spec__key {
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--text-muted);
}
.spec__value { color: var(--text-primary); text-align: right; }

/* ----- 04 · Pricing ---------------------------------------------------- */

.pricing { display: grid; gap: var(--s-4); align-items: stretch; }
@media (min-width: 58rem) { .pricing { grid-template-columns: repeat(3, 1fr); } }

.plan {
  position: relative;
  display: grid; gap: var(--s-4);
  align-content: start;
  padding: clamp(1.5rem, 1rem + 1.5vw, 2rem);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: var(--surface-raised);
}
.plan--featured {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.plan__flag {
  position: absolute; top: -0.6875rem; left: clamp(1.5rem, 1rem + 1.5vw, 2rem);
  padding: 0.1875rem 0.5rem;
  background: var(--accent-solid); color: var(--text-on-accent);
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  border-radius: var(--r-xs);
}
.plan__name { font-family: var(--font-display); font-size: var(--fs-xl); letter-spacing: var(--ls-tight); }
.plan__price { display: flex; align-items: baseline; gap: 0.375rem; }
.plan__amount {
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  letter-spacing: var(--ls-display);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.plan__period { font-size: var(--fs-sm); color: var(--text-muted); }
.plan__note { font-size: var(--fs-sm); color: var(--text-secondary); }
.plan__list { display: grid; gap: var(--s-2); padding-top: var(--s-4); border-top: 1px solid var(--rule); }
.plan__list li {
  display: grid; grid-template-columns: 1rem 1fr; gap: var(--s-3);
  font-size: var(--fs-sm); color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}
.plan__list svg { inline-size: 1rem; block-size: 1rem; margin-top: 0.3125rem; color: var(--accent); }
/* The call to action sits on the same baseline across all three cards. */
.plan > .btn { margin-top: auto; }

.billing-toggle {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 3px;
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-pill);
  background: var(--surface-sunken);
}
.billing-toggle button {
  padding: 0.375rem 0.875rem;
  border-radius: var(--r-pill);
  font-size: var(--fs-sm); font-weight: 520;
  color: var(--text-secondary);
  transition: background-color var(--dur-quick) var(--ease-standard),
              color var(--dur-quick) var(--ease-standard);
}
.billing-toggle button[aria-pressed="true"] {
  background: var(--surface-raised);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ----- 05 · FAQ -------------------------------------------------------- */

.faq { max-inline-size: 52rem; border-top: 1px solid var(--rule); }
.faq__item { border-bottom: 1px solid var(--rule); }
.faq__q {
  inline-size: 100%;
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--s-4);
  padding-block: var(--s-5);
  text-align: left;
  font-size: var(--fs-md);
  font-weight: 540;
  letter-spacing: var(--ls-tight);
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__sign {
  flex: none; inline-size: 1.25rem; block-size: 1.25rem;
  margin-top: 0.1875rem;
  position: relative; color: var(--accent);
}
.faq__sign::before, .faq__sign::after {
  content: ""; position: absolute; inset: 50% 0 auto 0;
  block-size: 1.5px; background: currentColor; border-radius: 1px;
  transition: transform var(--dur-base) var(--ease-entrance);
}
.faq__sign::after { transform: rotate(90deg); }
.faq__item[open] .faq__sign::after { transform: rotate(0deg); }
.faq__a {
  padding-bottom: var(--s-5);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  max-inline-size: 60ch;
}

/* ----- 06 · Signup CTA ------------------------------------------------- */

.cta-panel {
  position: relative;
  border-radius: var(--r-lg);
  background: var(--panel-bg);
  border: 1px solid var(--panel-bd);
  color: var(--panel-fg);
  padding: clamp(2rem, 1.2rem + 4vw, 4.5rem);
  overflow: hidden;
}
.cta-panel::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 70% at 88% 20%,
    color-mix(in srgb, var(--clay-500) 30%, transparent), transparent 65%);
  pointer-events: none;
}
.cta-panel > * { position: relative; }
.cta-panel .h2 { color: var(--panel-fg); max-inline-size: 18ch; }
.cta-panel .lede { color: var(--panel-fg-dim); }
.cta-panel .eyebrow { color: color-mix(in srgb, #F2EBDF 72%, transparent); }

.signup-form {
  display: grid; gap: var(--s-3);
  margin-top: var(--s-6);
  max-inline-size: 34rem;
}
@media (min-width: 34rem) {
  .signup-form { grid-template-columns: 1fr auto; align-items: start; }
  .signup-form .field { grid-column: 1; }
  .signup-form .btn { grid-column: 2; min-block-size: 3.0625rem; }
  .signup-form__note { grid-column: 1 / -1; }
}
.cta-panel .input {
  background: color-mix(in srgb, #F2EBDF 7%, transparent);
  border-color: color-mix(in srgb, #F2EBDF 34%, transparent);
  color: var(--panel-fg);
  min-block-size: 3.0625rem;
}
.cta-panel .input::placeholder { color: color-mix(in srgb, #F2EBDF 62%, transparent); }
.cta-panel .field__label { color: color-mix(in srgb, #F2EBDF 72%, transparent); }
.signup-form__note { font-size: var(--fs-xs); color: color-mix(in srgb, #F2EBDF 70%, transparent); }
.cta-panel :focus-visible { box-shadow: 0 0 0 2px var(--panel-bg), 0 0 0 4px var(--clay-300); }

.form-status {
  margin-top: var(--s-4);
  font-size: var(--fs-sm);
  color: var(--clay-300);
  min-block-size: 1.25rem;
}

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

.site-footer { border-top: 1px solid var(--rule); padding-block: var(--s-7) var(--s-6); }
.footer__grid {
  display: grid; gap: var(--s-6);
  grid-template-columns: 1fr;
}
@media (min-width: 48rem) { .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer__col h3 {
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--text-muted); margin-bottom: var(--s-3);
}
.footer__col a:not(.brand) {
  display: block; padding-block: 0.3125rem;
  font-size: var(--fs-sm); color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--dur-quick) var(--ease-standard);
}
.footer__col a:not(.brand):hover { color: var(--accent-text); }
.footer__bottom {
  display: flex; flex-wrap: wrap; gap: var(--s-4);
  align-items: center; justify-content: space-between;
  margin-top: var(--s-7); padding-top: var(--s-5);
  border-top: 1px solid var(--rule);
  font-size: var(--fs-xs); color: var(--text-muted);
}

/* ----- Theme switch (shared with app pages) ---------------------------- */

.theme-toggle {
  inline-size: 2.25rem; block-size: 2.25rem;
  display: grid; place-items: center;
  border: 1px solid var(--rule); border-radius: var(--r-sm);
  color: var(--text-secondary);
  transition: color var(--dur-quick) var(--ease-standard),
              border-color var(--dur-quick) var(--ease-standard);
}
.theme-toggle:hover { color: var(--text-primary); border-color: var(--rule-strong); }
.theme-toggle svg { inline-size: 1.0625rem; block-size: 1.0625rem; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
}