/* ---- Design tokens, matched to the Rotiplate app stylesheet ---- */
:root {
  /* color */
  --color-primary-darker: hsl(241, 84%, 60%);
  --color-primary-dark:   hsl(241, 84%, 64%);
  --color-primary:        hsl(241, 84%, 68%);
  --color-primary-light:  hsl(241, 84%, 73%);
  --color-primary-lighter:hsl(241, 84%, 79%);

  --color-accent-dark:    hsl(344, 72%, 58%);
  --color-accent:         hsl(344, 72%, 65%);
  --color-accent-light:   hsl(344, 72%, 71%);

  --color-black: hsl(273, 100%, 4%);
  --color-white: hsl(0, 0%, 100%);

  --color-bg: hsl(47, 100%, 94%);
  --color-bg-light:   hsl(0, 0%, 100%);
  --color-bg-darker:  hsl(270, 4%, 89%);

  --color-contrast-lower:  hsl(280, 4%, 84%);
  --color-contrast-low:    hsl(260, 3%, 63%);
  --color-contrast-medium: hsl(270, 4%, 44%);
  --color-contrast-high:   hsl(267, 11%, 19%);
  --color-contrast-higher: hsl(273, 100%, 4%);

  --color-border-alpha: hsla(273, 100%, 4%, 0.095);
  --color-error: hsl(359, 70%, 48%);
  --color-error-bg: hsl(359, 100%, 96%);
  --color-success: hsl(112, 45%, 32%);
  --color-success-bg: hsl(112, 55%, 94%);

  /* space */
  --space-unit: 1rem;
  --space-xxxs: calc(0.25 * var(--space-unit));
  --space-xxs:  calc(0.375 * var(--space-unit));
  --space-xs:   calc(0.5 * var(--space-unit));
  --space-sm:   calc(0.75 * var(--space-unit));
  --space-md:   calc(1.25 * var(--space-unit));
  --space-lg:   calc(2 * var(--space-unit));
  --space-xl:   calc(3.25 * var(--space-unit));
  --space-xxl:  calc(5.25 * var(--space-unit));
  --space-xxxl: calc(8.5 * var(--space-unit));

  /* type — 1.2 modular scale, Inter only, per app stylesheet */
  --font-primary: 'Inter', sans-serif;
  --text-unit: 1rem;
  --text-scale-ratio: 1.2;
  --text-xs:   calc((var(--text-unit) / var(--text-scale-ratio)) / var(--text-scale-ratio));
  --text-sm:   calc(var(--text-xs) * var(--text-scale-ratio));
  --text-md:   calc(var(--text-sm) * var(--text-scale-ratio) * var(--text-scale-ratio));
  --text-lg:   calc(var(--text-md) * var(--text-scale-ratio));
  --text-xl:   calc(var(--text-lg) * var(--text-scale-ratio));
  --text-xxl:  calc(var(--text-xl) * var(--text-scale-ratio));
  --text-xxxl: calc(var(--text-xxl) * var(--text-scale-ratio));
  --text-xxxxl:calc(var(--text-xxxl) * var(--text-scale-ratio));
  --heading-line-height: 1.2;
  --body-line-height: 1.4;

  /* radius + shadow + easing, from the app stylesheet */
  --radius: 0.4em;
  --radius-sm: calc(var(--radius) / 2);
  --radius-lg: calc(var(--radius) * 2);

  --shadow-sm: 0 0.3px 0.4px hsla(0,0%,0%,0.02), 0 0.9px 1.5px hsla(0,0%,0%,0.045), 0 3.5px 6px hsla(0,0%,0%,0.09);
  --shadow-md: 0 0.9px 1.25px hsla(0,0%,0%,0.025), 0 3px 5px hsla(0,0%,0%,0.05), 0 12px 20px hsla(0,0%,0%,0.09);
  --shadow-lg: 0 1.2px 1.9px -1px hsla(0,0%,0%,0.01), 0 3px 5px -1px hsla(0,0%,0%,0.015), 0 8px 15px -1px hsla(0,0%,0%,0.05), 0 28px 40px -1px hsla(0,0%,0%,0.1);

  --ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
  --ease-in-out: cubic-bezier(0.645, 0.045, 0.355, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-contrast-high);
  font-family: var(--font-primary);
  font-size: var(--text-unit);
  line-height: var(--body-line-height);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-primary);
  line-height: var(--heading-line-height);
  color: var(--color-black);
  letter-spacing: -0.015em;
}

.label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-contrast-medium);
}

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

.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* NAV */
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: hsla(51, 100%, 88%, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-alpha);
}
nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-xxs);
  font-weight: 800;
  font-size: var(--text-md);
  color: var(--color-black);
}
.logo-mark {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: hsla(52, 100%, 60%, 0.85);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 3px;
  padding: 5px;
  flex-shrink: 0;
}
.logo-mark span { background: var(--color-bg-light); border-radius: 2px; }
.logo-mark span:nth-child(1) { background: hsl(121, 72%, 65%); }
.logo-mark span:nth-child(2) { background: hsl(344, 72%, 65%); }
.logo-mark span:nth-child(3) { background: hsl(82, 72%, 65%); }
.logo-mark span:nth-child(4) { background: hsl(11, 72%, 65%); }


.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-contrast-medium);
}
.nav-links a { transition: color 0.15s var(--ease-out); }
.nav-links a:hover { color: var(--color-black); }
.nav-links a.active { color: var(--color-primary-darker); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xxs);
  padding: 0.72rem 1.3rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--text-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s var(--ease-out), box-shadow 0.15s var(--ease-out), background 0.15s var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent;
  border-color: var(--color-border-alpha);
  color: var(--color-black);
}
.btn-ghost:hover { background: var(--color-bg-light); }

/* HERO */
header.hero { padding: 5.75rem 0 3.75rem; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: center;
}
.eyebrow {
  color: var(--color-primary-darker);
  margin-bottom: var(--space-sm);
  display: inline-block;
}
h1.headline {
  font-size: clamp(2.2rem, 4.4vw, var(--text-xxxxl));
  font-weight: 800;
  max-width: 15ch;
}
.hero-sub {
  margin-top: var(--space-md);
  font-size: var(--text-md);
  color: var(--color-contrast-medium);
  max-width: 46ch;
  line-height: 1.6;
}
.hero-ctas {
  margin-top: var(--space-lg);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.hero-note {
  margin-top: var(--space-md);
  font-size: var(--text-xs);
  color: var(--color-contrast-medium);
}
.hero-note code {
  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
  background: var(--color-bg-light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-alpha);
}

/* INTERACTIVE MOCK */
.mock {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border-alpha);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.mock-topbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-alpha);
}
.mock-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--color-contrast-lower); }
.mock-title {
  margin-left: var(--space-xxs);
  font-size: var(--text-xs);
  color: var(--color-contrast-medium);
  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
}
.mock-body {
  display: grid;
  grid-template-columns: 168px 1fr;
  min-height: 320px;
}
.mock-sidebar {
  background: var(--color-bg);
  border-right: 1px solid var(--color-border-alpha);
  padding: var(--space-md) var(--space-sm);
}
.mock-sidebar-label {
  font-size: var(--text-xs);
  color: var(--color-contrast-medium);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0 var(--space-xxs) var(--space-xs);
}
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.56rem var(--space-xxs);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s var(--ease-out);
}
.toggle-row:hover { background: var(--color-bg-darker); }
.switch {
  width: 30px;
  height: 17px;
  border-radius: 20px;
  background: var(--color-contrast-lower);
  position: relative;
  flex-shrink: 0;
  transition: background 0.18s var(--ease-out);
}
.switch::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--color-white);
  transition: transform 0.18s var(--ease-out);
}
.toggle-row.on .switch { background: var(--color-primary); }
.toggle-row.on .switch::after { transform: translateX(13px); }

.mock-main {
  padding: var(--space-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  align-content: start;
}
.mod-card {
  border: 1px solid var(--color-border-alpha);
  border-radius: var(--radius);
  padding: var(--space-sm);
  background: var(--color-bg-light);
  opacity: 0;
  transform: translateY(6px) scale(0.98);
  transition: opacity 0.22s var(--ease-out), transform 0.22s var(--ease-out);
  pointer-events: none;
}
.mod-card.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.mod-card .icon-row {
  width: 26px; height: 26px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-lighter);
  margin-bottom: var(--space-xs);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary-darker);
  font-size: var(--text-sm);
}
.mod-card h4 { font-size: var(--text-sm); font-weight: 600; margin-bottom: 3px; }
.mod-card p { font-size: var(--text-xs); color: var(--color-contrast-medium); line-height: 1.5; }

.mock-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--color-contrast-medium);
  font-size: var(--text-sm);
}

/* PLUGINS SECTION */
section.plugins { padding: 5.5rem 0 2.5rem; }
.section-head { max-width: 52ch; margin-bottom: var(--space-xl); }
.section-head h2 {
  font-size: clamp(1.6rem, 2.8vw, var(--text-xxl));
  font-weight: 700;
}
.section-head p {
  margin-top: var(--space-xs);
  color: var(--color-contrast-medium);
  font-size: var(--text-md);
}
.plugin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--space-sm);
}
.plugin-card {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border-alpha);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: border-color 0.2s var(--ease-out), transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.plugin-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.plugin-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-sm);
  font-size: var(--text-md);
}
.plugin-card h3 { font-size: var(--text-md); font-weight: 600; margin-bottom: var(--space-xxxs); }
.plugin-card p { font-size: var(--text-sm); color: var(--color-contrast-medium); line-height: 1.55; }

/* HOW IT WORKS */
section.how { padding: 5.5rem 0; }
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
.step-num {
  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
  font-size: var(--text-xs);
  color: var(--color-primary-darker);
  font-weight: 500;
  display: block;
  margin-bottom: var(--space-xs);
}
.step-num.core { color: var(--color-accent-dark); }
.step h3 { font-size: var(--text-md); font-weight: 600; margin-bottom: var(--space-xxs); }
.step p { font-size: var(--text-sm); color: var(--color-contrast-medium); line-height: 1.6; }
.step-line { height: 1px; background: var(--color-border-alpha); margin-top: var(--space-md); }

/* CTA BANNER */
section.cta-band { padding: var(--space-md) 0 var(--space-xxl); }
.band {
  background: var(--color-black);
  color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.band h2 {
  color: var(--color-white);
  font-size: clamp(1.4rem, 2.4vw, var(--text-xl));
  max-width: 22ch;
}
.band p {
  margin-top: var(--space-xxs);
  color: hsla(51,100%,88%,0.65);
  font-size: var(--text-sm);
  max-width: 40ch;
}
.band .btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.band .btn-primary:hover { background: var(--color-primary-light); }

/* FOOTER */
footer { border-top: 1px solid var(--color-border-alpha); padding-top: var(--space-xl); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
}
.footer-brand .logo { margin-bottom: var(--space-xs); }
.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-contrast-medium);
  max-width: 26ch;
}
.footer-col { display: flex; flex-direction: column; gap: var(--space-xxs); }
.footer-col .label { margin-bottom: var(--space-xxs); }
.footer-col a, .footer-col p {
  font-size: var(--text-sm);
  color: var(--color-contrast-medium);
}
.footer-col a { transition: color 0.15s var(--ease-out); }
.footer-col a:hover { color: var(--color-black); }

.footer-bottom {
  border-top: 1px solid var(--color-border-alpha);
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-xs);
  color: var(--color-contrast-medium);
}

/* PAGE HEADER (about / contact) */
.page-header { padding: 4.5rem 0 2.5rem; }
.page-header h1 {
  font-size: clamp(2rem, 3.6vw, var(--text-xxxl));
  font-weight: 800;
  max-width: 20ch;
}
.page-header p {
  margin-top: var(--space-sm);
  font-size: var(--text-md);
  color: var(--color-contrast-medium);
  max-width: 52ch;
}

/* ABOUT PAGE */
.about-section { padding: 2rem 0; }
.about-section + .about-section { padding-top: 0; }
.about-section h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}
.about-section p {
  font-size: var(--text-md);
  color: var(--color-contrast-medium);
  max-width: 62ch;
  line-height: 1.65;
}
.about-section p + p { margin-top: var(--space-sm); }
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.about-card {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border-alpha);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}
.about-card h3 { font-size: var(--text-md); font-weight: 600; margin-bottom: var(--space-xxxs); }
.about-card p { font-size: var(--text-sm); max-width: none; }

/* CONTACT PAGE */
.contact-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xxl);
  align-items: start;
}
.contact-form {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border-alpha);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.form-row { margin-bottom: var(--space-md); }
.form-row label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-xxs);
}
.form-row input,
.form-row textarea {
  width: 100%;
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-border-alpha);
  border-radius: var(--radius);
  background: var(--color-bg-light);
  color: var(--color-black);
  transition: border-color 0.15s var(--ease-out);
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}
.form-row textarea { min-height: 140px; resize: vertical; }
.form-hp { position: absolute; left: -9999px; top: -9999px; }

.form-alert {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
}
.form-alert.success { background: var(--color-success-bg); color: var(--color-success); }
.form-alert.error { background: var(--color-error-bg); color: var(--color-error); }
.form-alert ul { margin: var(--space-xxs) 0 0 1.1em; }

.contact-aside {
  background: var(--color-black);
  color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.contact-aside h3 { color: var(--color-white); font-size: var(--text-md); margin-bottom: var(--space-sm); }
.contact-aside .label { color: hsla(51,100%,88%,0.55); }
.contact-aside p, .contact-aside a { font-size: var(--text-sm); color: hsla(51,100%,88%,0.85); }
.contact-aside a:hover { color: var(--color-white); }
.contact-aside-block { margin-bottom: var(--space-md); }
.contact-aside-block:last-child { margin-bottom: 0; }

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

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .mock-body { grid-template-columns: 130px 1fr; }
  .mock-main { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .band { padding: var(--space-lg) var(--space-md); }
  header.hero { padding: var(--space-xl) 0 var(--space-lg); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: var(--space-xxs); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}