/* =========================================================================
   lucithinx — marketing site styles
   Design language: light-first, warm paper background, violet + coral signal
   accent. Deliberately distinct from dark-tech + single-cyan-accent category
   convention (see brief §"Görsel kimlik").
   ========================================================================= */

/* ---------------------------------------------------------------------
   1. Design tokens — every "magic number" lives here, named by intent.
   --------------------------------------------------------------------- */
:root {
  /* Color: brand */
  --color-ink: #1a1a1e;
  --color-paper: #fbfaf7;
  --color-paper-dim: #f2efe9;
  /* Single restrained editorial accent (clay). Used sparingly. */
  --color-accent: #bd4b2c;
  --color-accent-dark: #9c3d21;
  /* Legacy aliases so existing rules resolve to the single accent (no gradient). */
  --color-primary: #bd4b2c;
  --color-primary-dark: #9c3d21;
  --color-signal: #bd4b2c;
  --color-signal-dark: #9c3d21;

  /* Color: neutrals derived from ink for consistent tinting */
  --color-text-body: #33313a;
  --color-text-muted: #6a6874;
  --color-border-hairline: rgba(26, 26, 30, 0.12);
  --color-border-hairline-strong: rgba(26, 26, 30, 0.2);
  --color-surface-card: #ffffff;

  /* Color: on-dark section (single contrast section, not the whole site) */
  --color-on-dark-text: #f4f3ef;
  --color-on-dark-muted: #a7a4ad;
  --color-on-dark-surface: #1f1f24;
  --color-on-dark-border: rgba(244, 243, 239, 0.14);

  /* No signature gradient in the editorial system — the accent is solid. */
  --gradient-signature: var(--color-accent);

  /* Typography: self-contained system stack, no external font requests */
  --font-family-base:
    -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;

  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.375rem;
  --font-size-xl: 1.875rem;
  --font-size-2xl: 2.75rem;
  --font-size-3xl: 3.75rem;

  --line-height-tight: 1.15;
  --line-height-snug: 1.35;
  --line-height-body: 1.6;

  --letter-spacing-tight: -0.02em;
  --letter-spacing-wide: 0.08em;

  /* Spacing scale (8px rhythm) */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 5.5rem;
  --space-8: 7.5rem;

  /* Shape */
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-pill: 999px;

  /* Elevation — soft, never harsh */
  --shadow-card: 0 1px 2px rgba(26, 26, 30, 0.04);
  --shadow-card-hover: 0 6px 20px rgba(26, 26, 30, 0.08);

  /* Motion */
  --duration-fast: 150ms;
  --duration-base: 220ms;
  --easing-standard: cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --shell-max-width: 1180px;
  --shell-max-width-narrow: 760px;
  --shell-padding-inline: clamp(1.25rem, 4vw, 2.5rem);
  --header-height: 76px;
}

/* ---------------------------------------------------------------------
   2. Reset & base
   --------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  background-color: var(--color-paper);
  color: var(--color-text-body);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p,
ol,
ul,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

input,
select,
textarea {
  font: inherit;
  color: inherit;
}

/* Respect user motion preference everywhere */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------------------------------------------------------------
   3. Accessibility utilities
   --------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-3);
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  background: var(--color-ink);
  color: var(--color-paper);
  border-radius: var(--radius-sm);
  transition: top var(--duration-fast) var(--easing-standard);
}

.skip-link:focus {
  top: var(--space-2);
}

/* Consistent, visible focus ring across all interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------------------------------------------------------------------
   4. Layout primitives
   --------------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell-max-width);
  margin-inline: auto;
  padding-inline: var(--shell-padding-inline);
}

.shell-narrow {
  max-width: var(--shell-max-width-narrow);
}

.section {
  padding-block: var(--space-8);
}

.section-alt {
  background-color: var(--color-paper-dim);
}

.section-dark {
  background-color: var(--color-ink);
  color: var(--color-on-dark-text);
}

.section-pilot {
  background-color: var(--color-paper-dim);
}

.section-head {
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
  text-align: center;
}

.section-head-left {
  margin-inline: 0;
  text-align: left;
  max-width: 520px;
}

.section-lead {
  margin-top: var(--space-3);
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  line-height: var(--line-height-snug);
}

.section-lead-on-dark {
  color: var(--color-on-dark-muted);
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 960px) {
  .grid-5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .grid-2,
  .grid-3,
  .grid-5 {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------------
   5. Typography
   --------------------------------------------------------------------- */
.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-primary-dark);
}

.eyebrow-on-dark {
  color: #c9b8ff;
}

h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-ink);
}

h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-ink);
}

.section-dark h2 {
  color: var(--color-on-dark-text);
}

h3 {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: var(--space-1);
}

.section-dark h3 {
  color: var(--color-on-dark-text);
}

@media (max-width: 640px) {
  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }
}

/* ---------------------------------------------------------------------
   6. Buttons
   --------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--font-size-base);
  line-height: 1;
  border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--easing-standard),
    box-shadow var(--duration-fast) var(--easing-standard),
    background-color var(--duration-fast) var(--easing-standard);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-paper);
}

.btn-primary:hover {
  background: #2e2e34;
  box-shadow: var(--shadow-card-hover);
}

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

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border-hairline-strong);
}

.btn-ghost:hover {
  background: rgba(23, 20, 35, 0.04);
}

.btn-small {
  padding: 0.6rem 1.1rem;
  font-size: var(--font-size-sm);
}

/* ---------------------------------------------------------------------
   7. Header
   --------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(251, 250, 247, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border-hairline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.brand-word {
  font-size: var(--font-size-md);
  font-weight: 800;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-ink);
}

.brand-word-accent {
  background: var(--gradient-signature);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-word-footer {
  color: var(--color-paper);
}

.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  gap: var(--space-5);
}

.nav-list a {
  font-size: var(--font-size-sm);
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--easing-standard);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-toggle {
  display: none;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  position: relative;
  transition: transform var(--duration-fast) var(--easing-standard);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

/* ---------------------------------------------------------------------
   8. Language switcher
   --------------------------------------------------------------------- */
.lang-switch {
  display: inline-flex;
  padding: 3px;
  background: var(--color-paper-dim);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-pill);
}

.lang-switch-footer {
  background: rgba(251, 250, 247, 0.08);
  border-color: var(--color-on-dark-border);
}

.lang-btn {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-muted);
  transition: background-color var(--duration-fast) var(--easing-standard),
    color var(--duration-fast) var(--easing-standard);
}

.lang-switch-footer .lang-btn {
  color: var(--color-on-dark-muted);
}

.lang-btn[aria-pressed="true"] {
  background: var(--color-ink);
  color: var(--color-paper);
}

.lang-switch-footer .lang-btn[aria-pressed="true"] {
  background: var(--color-paper);
  color: var(--color-ink);
}

/* ---------------------------------------------------------------------
   9. Hero
   --------------------------------------------------------------------- */
.hero {
  padding-block: var(--space-7) var(--space-8);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}

.hero-copy h1 {
  margin-bottom: var(--space-3);
}

.hero-sub {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero-note {
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.wave-art {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

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

  .hero-visual {
    order: -1;
  }
}

/* ---------------------------------------------------------------------
   10. Cards
   --------------------------------------------------------------------- */
/*
 * Shared card geometry. The selector list below is the single source of
 * truth for the padding/surface/border/radius used by every card-like
 * block on the page (problem cards, capability cards, control cards,
 * steps). `.card` and `.capability-card` additionally opt into the shadow +
 * hover lift below; `.step` (see §11) uses the flat surface only,
 * unchanged from before. Combine in HTML, e.g. `class="card
 * capability-card"` — see AHA/Metz: wait for the 3rd repetition, this is
 * the 3rd, so it's earned.
 */
.card,
.capability-card,
.step {
  padding: var(--space-4);
  background: var(--color-surface-card);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-md);
}

.card,
.capability-card {
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--duration-base) var(--easing-standard),
    transform var(--duration-base) var(--easing-standard);
}

.card:hover,
.capability-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card p,
.capability-card p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.card-on-dark {
  background: var(--color-on-dark-surface);
  border-color: var(--color-on-dark-border);
}

.card-on-dark p {
  color: var(--color-on-dark-muted);
}

.capability-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-3);
  background: var(--color-paper-dim);
  border-radius: var(--radius-sm);
}

/* ---------------------------------------------------------------------
   11. How-it-works steps
   --------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  counter-reset: step;
}

.step-index {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: 800;
  background: var(--gradient-signature);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

@media (max-width: 960px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------------
   12. Control section layout
   --------------------------------------------------------------------- */
.control-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: var(--space-6);
  align-items: start;
}

@media (max-width: 900px) {
  .control-inner {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------------
   13. Accordion (FAQ)
   --------------------------------------------------------------------- */
.accordion-item {
  border-bottom: 1px solid var(--color-border-hairline);
}

.accordion-header {
  margin: 0;
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4) 0;
  text-align: left;
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-ink);
}

.accordion-icon {
  position: relative;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-left: var(--space-3);
}

.accordion-icon::before,
.accordion-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--color-primary);
  transform: translate(-50%, -50%);
  transition: transform var(--duration-base) var(--easing-standard);
}

.accordion-icon::before {
  width: 14px;
  height: 2px;
}

.accordion-icon::after {
  width: 2px;
  height: 14px;
}

.accordion-trigger[aria-expanded="true"] .accordion-icon::after {
  transform: translate(-50%, -50%) rotate(90deg) scaleY(0);
}

.accordion-panel {
  padding-bottom: var(--space-4);
  color: var(--color-text-muted);
  max-width: 65ch;
}

/* ---------------------------------------------------------------------
   14. Pilot form
   --------------------------------------------------------------------- */
.pilot-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface-card);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-row-full {
  grid-column: 1 / -1;
}

.form-row label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-ink);
}

.form-row input,
.form-row select,
.form-row textarea {
  padding: 0.75rem 0.9rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border-hairline-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast) var(--easing-standard);
}

.form-row input:focus-visible,
.form-row select:focus-visible,
.form-row textarea:focus-visible {
  border-color: var(--color-primary);
}

.form-row textarea {
  resize: vertical;
  min-height: 96px;
}

.form-status {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary-dark);
  min-height: 1.2em;
}

.form-status.is-error {
  color: var(--color-signal-dark);
}

@media (max-width: 640px) {
  .pilot-form {
    grid-template-columns: 1fr;
    padding: var(--space-4);
  }
}

/* ---------------------------------------------------------------------
   15. Footer
   --------------------------------------------------------------------- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-on-dark-muted);
  padding-block: var(--space-6);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr 1fr;
  gap: var(--space-5);
  align-items: start;
}

.footer-tag {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  max-width: 32ch;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-on-dark-muted);
  transition: color var(--duration-fast) var(--easing-standard);
}

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

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.footer-copyright {
  font-size: var(--font-size-sm);
}

@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------------
   16. Mobile navigation
   Collapse to the hamburger at <=1024px: below this the full inline nav
   (5 items + lang switch + CTA) gets cramped and wraps mid-word.
   --------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .nav-toggle {
    display: inline-flex;
  }

  /* Keep the nav — and its hamburger button — in the header row. Only the
     dropdown list is lifted out of flow. Previously .main-nav itself was
     position:absolute, which dragged the toggle below the header on mobile. */
  .main-nav {
    flex: 0 0 auto;
    margin-left: auto;
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: var(--space-3) var(--shell-padding-inline);
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-border-hairline);
    box-shadow: 0 12px 24px rgba(23, 20, 35, 0.08);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li {
    padding-block: var(--space-2);
    border-bottom: 1px solid var(--color-border-hairline);
  }

  .nav-list li:last-child {
    border-bottom: 0;
  }

  .header-actions .btn-small {
    display: none;
  }
}

@media (max-width: 480px) {
  .header-actions .lang-switch {
    transform: scale(0.92);
  }
}

/* ---------------------------------------------------------------------
   17. Hero figure — editorial, static. A quiet hairline schematic
   (voice call → structured record) drawn in ink on a paper-dim card.
   No gradient, no glow, no animation.
   --------------------------------------------------------------------- */
.hero-figure .stroke {
  fill: none;
  stroke: var(--color-ink);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-figure .stroke-soft {
  stroke: var(--color-border-hairline-strong);
}

.hero-figure .fill-ink { fill: var(--color-ink); }
.hero-figure .fill-soft { fill: var(--color-border-hairline-strong); }
.hero-figure .fill-accent { fill: var(--color-accent); }