/* ============================================================
   dev-landing.css — Opita Code Dev Landing
   Brand-aligned independent dev presence.
   Uses --opita-* design tokens from css-variables.css
   ============================================================ */

/* ── Reset & Base ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--opita-color-paper);
  color: var(--opita-color-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* ── Container ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
}

/* ── Section ── */
.section {
  padding: clamp(48px, 10vh, 100px) 0;
}

.section__title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: clamp(8px, 1.5vw, 14px);
}

.section__subtitle {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--opita-color-muted);
  max-width: 36em;
  line-height: 1.6;
  margin-bottom: clamp(24px, 4vh, 44px);
}

/* ── Dark Sections ── */
.section--dark {
  background: var(--opita-color-inverse-paper);
  color: var(--opita-color-inverse-ink);
}

.section--dark .section__subtitle {
  color: var(--opita-color-line);
}

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--opita-color-paper);
  border-bottom: 1px solid var(--opita-color-line);
  padding: 0 clamp(16px, 4vw, 48px);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  height: 64px;
}

.nav__logo { display: flex; align-items: center; }
.nav__logo-img { height: 28px; width: auto; }

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 28px);
  list-style: none;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--opita-color-muted);
  transition: color var(--opita-motion-quick, 120ms) var(--opita-ease-standard);
  padding: 8px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav__link:hover,
.nav__link:focus-visible { color: var(--opita-color-ink); }

/* ── Hero ── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(48px, 12vh, 120px) 0 clamp(32px, 8vh, 72px);
}

.hero__symbol {
  width: clamp(48px, 7vw, 72px);
  height: auto;
  margin-bottom: clamp(12px, 2vh, 24px);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  border: 1px solid var(--opita-color-line);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--opita-color-muted);
  margin-bottom: clamp(12px, 2vh, 20px);
  font-family: monospace;
}

.hero__tagline {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 14ch;
}

.hero__subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--opita-color-muted);
  max-width: 34em;
  margin-top: clamp(12px, 2vh, 20px);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 12px;
  margin-top: clamp(20px, 3vh, 32px);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 1.5vw, 16px) clamp(24px, 3vw, 36px);
  background: var(--opita-color-ink);
  color: var(--opita-color-inverse-ink);
  font-weight: 600;
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  border-radius: 8px;
  transition: background var(--opita-motion-quick, 120ms) var(--opita-ease-standard);
  min-height: 48px;
}

.hero__cta:hover { background: var(--opita-color-graphite); }

.hero__cta-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 1.5vw, 16px) clamp(24px, 3vw, 36px);
  border: 1px solid var(--opita-color-line);
  color: var(--opita-color-ink);
  font-weight: 500;
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  border-radius: 8px;
  transition: border-color var(--opita-motion-quick, 120ms);
  min-height: 48px;
}

.hero__cta-secondary:hover { border-color: var(--opita-color-ink); }

/* ── Services Grid ── */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2vw, 24px);
}

@media (min-width: 640px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .services-grid { grid-template-columns: repeat(4, 1fr); } }

.service-card {
  background: var(--opita-color-surface);
  border-radius: 16px;
  padding: clamp(20px, 3vw, 28px);
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.section--dark .service-card {
  background: var(--opita-color-graphite);
}

.service-card__icon {
  width: 36px;
  height: 36px;
  margin-bottom: 14px;
  color: var(--opita-color-ink);
}

.section--dark .service-card__icon { color: var(--opita-color-inverse-ink); }

.service-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}

.service-card__desc {
  font-size: 0.9rem;
  color: var(--opita-color-muted);
  line-height: 1.6;
  flex: 1;
}

.section--dark .service-card__desc { color: var(--opita-color-line); }

/* ── Projects Grid ── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2vw, 24px);
}

@media (min-width: 640px) { .projects-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .projects-grid { grid-template-columns: repeat(3, 1fr); } }

.project-card {
  border: 1px solid var(--opita-color-line);
  border-radius: 16px;
  padding: clamp(20px, 3vw, 28px);
  display: flex;
  flex-direction: column;
}

.project-card__number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--opita-color-line);
  line-height: 1;
  margin-bottom: 12px;
}

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.project-card__tagline {
  font-size: 0.85rem;
  color: var(--opita-color-muted);
  margin-bottom: 10px;
}

.project-card__desc {
  font-size: 0.88rem;
  color: var(--opita-color-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 14px;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px solid var(--opita-color-line);
}

.project-card__tags span {
  padding: 3px 10px;
  border: 1px solid var(--opita-color-line);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--opita-color-muted);
}

/* ── Founder ── */
.founder-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

@media (min-width: 640px) { .founder-grid { grid-template-columns: auto 1fr; } }

.founder__photo-wrapper {
  position: relative;
  width: clamp(160px, 25vw, 200px);
  height: clamp(160px, 25vw, 200px);
  border-radius: 16px;
  overflow: hidden;
  background: var(--opita-color-graphite);
  flex-shrink: 0;
}

.founder__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.founder__photo-wrapper--empty .founder__photo { display: none; }

.founder__photo-placeholder {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--opita-color-line);
}

.founder__photo-wrapper--empty .founder__photo-placeholder { display: flex; }

.founder__info { display: flex; flex-direction: column; gap: 8px; }

.founder__name {
  font-size: 1.25rem;
  font-weight: 700;
}

.founder__role {
  font-size: 0.9rem;
  color: var(--opita-color-line);
  font-family: monospace;
}

.founder__bio {
  font-size: 0.9rem;
  color: var(--opita-color-line);
  line-height: 1.7;
}

.founder__meta {
  font-size: 0.82rem;
  color: var(--opita-color-muted);
  margin-top: 4px;
}

.founder__links {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.founder__link {
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--opita-color-line);
  transition: border-color var(--opita-motion-quick, 120ms);
}

.founder__link:hover { border-color: rgba(255,255,255,0.35); }

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 640px) { .contact-grid { grid-template-columns: 1fr 1fr; } }

.contact-channels { display: flex; flex-direction: column; gap: 12px; }

.contact-channel {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--opita-color-surface);
  border-radius: 12px;
  transition: background var(--opita-motion-quick, 120ms);
  min-height: 56px;
}

.contact-channel:hover { background: var(--opita-color-line); }

.contact-channel__label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--opita-color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 64px;
}

.contact-channel__value {
  font-size: 0.9rem;
  font-weight: 500;
}

.contact-form {
  background: var(--opita-color-surface);
  border-radius: 16px;
  padding: clamp(20px, 3vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-form__title { font-size: 1.05rem; font-weight: 700; }

.contact-form__placeholder { display: flex; flex-direction: column; gap: 10px; }

.contact-form__input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--opita-color-line);
  border-radius: 8px;
  background: var(--opita-color-paper);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--opita-color-ink);
  min-height: 44px;
}

.contact-form__input::placeholder { color: var(--opita-color-muted); }

.contact-form__textarea { resize: vertical; min-height: 90px; }

.contact-form__btn {
  padding: 12px 24px;
  background: var(--opita-color-ink);
  color: var(--opita-color-inverse-ink);
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  min-height: 48px;
}

.contact-form__btn:disabled { opacity: 0.5; cursor: not-allowed; }

.contact-form__footnote {
  font-size: 0.78rem;
  color: var(--opita-color-muted);
  text-align: center;
}

/* ── Footer ── */
.footer {
  background: var(--opita-color-inverse-paper);
  color: var(--opita-color-inverse-ink);
  padding: clamp(32px, 6vh, 56px) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: clamp(12px, 2vw, 20px);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
}

.footer__lockup { width: 100px; height: auto; }

.footer__tagline {
  font-size: 0.9rem;
  color: var(--opita-color-line);
}

.footer__divider {
  width: 100%;
  max-width: 400px;
  height: 1px;
  background: rgba(255,255,255,0.08);
  border: none;
}

.footer__copyright {
  font-size: 0.78rem;
  color: var(--opita-color-muted);
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}