/* ByBento Landing — styles.css
   Editorial Japanese minimalism. Typography-forward.
   Dark canvas, coral accent, bento grid signature.
   ================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--weight-regular);
  font-size: var(--text-body);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

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

/* ─── Reveal animation base ─── */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out),
              transform 600ms var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero elements: stagger with different distances */
.hero__headline[data-reveal] {
  transform: translateY(32px);
  transition-duration: 800ms;
}


/* ══════════════════════════════════════════════════
   NAV
   ══════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-lg) 0;
  transition: background-color var(--duration-normal) var(--ease-out),
              padding var(--duration-normal) var(--ease-out);
}

.nav.is-scrolled {
  background-color: rgba(11, 11, 15, 0.95);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo-icon {
  color: var(--color-coral);
  flex-shrink: 0;
}

.nav__logo-text {
  font-family: var(--font-primary);
  font-weight: var(--weight-bold);
  font-size: 1.25rem;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.nav__cta {
  font-family: var(--font-primary);
  font-weight: var(--weight-semibold);
  font-size: var(--text-small);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-coral);
  padding: var(--space-xs) 0;
  position: relative;
}

.nav__cta::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-coral);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__cta:hover::after {
  width: 100%;
}


/* ══════════════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-primary);
  font-weight: var(--weight-semibold);
  font-size: var(--text-small);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: background var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-coral);
  color: var(--color-bg);
}

.btn--primary:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-hover);
}

.btn--ghost:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.btn--large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-small);
}

/* Focus-visible for accessibility */
.btn:focus-visible,
.nav__cta:focus-visible,
a:focus-visible,
.form__input:focus-visible {
  outline: 2px solid var(--color-coral);
  outline-offset: 2px;
}


/* ══════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: flex-end;
  padding: var(--space-5xl) 0 var(--space-4xl);
  overflow: hidden;
}

/* Film grain overlay */
.hero__grain {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 256px;
}

/* Subtle grid pattern — bento metaphor, not decorative glow */
.hero__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(ellipse 60% 50% at 80% 30%, rgba(0,0,0,0.4) 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 80% 30%, rgba(0,0,0,0.4) 0%, transparent 70%);
}

.hero__inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  width: 100%;
}

.hero__headline {
  font-family: var(--font-secondary);
  font-weight: var(--weight-bold);
  font-size: var(--text-hero);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  max-width: 14ch;
  margin-bottom: var(--space-xl);
}

.hero__headline-accent {
  color: var(--color-coral);
}

.hero__sub {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
  max-width: 42ch;
  margin-bottom: var(--space-2xl);
}

/* Decorative rule between headline and subtext */
.hero__headline::after {
  content: '';
  display: block;
  width: 0;
  height: 2px;
  background: var(--color-coral);
  margin-top: var(--space-lg);
  transition: width 800ms var(--ease-out) 400ms;
}

.hero__headline.is-visible::after {
  width: 64px;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-2xl);
  right: var(--gutter);
  width: 1px;
  height: 48px;
  background: var(--color-border);
  overflow: hidden;
}

.hero__scroll-hint span {
  display: block;
  width: 100%;
  height: 16px;
  background: var(--color-coral);
  animation: scroll-hint 2s var(--ease-in-out) infinite;
}

@keyframes scroll-hint {
  0%   { transform: translateY(-16px); }
  50%  { transform: translateY(48px); }
  100% { transform: translateY(-16px); }
}


/* ══════════════════════════════════════════════════
   ABOUT
   ══════════════════════════════════════════════════ */

.about {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--color-border);
}

.about__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4xl);
}

.about__headline {
  font-family: var(--font-secondary);
  font-weight: var(--weight-bold);
  font-size: var(--text-h2);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  max-width: 28ch;
}

.about__body {
  font-size: clamp(1rem, 1.3vw, 1.125rem);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-top: var(--space-lg);
}

.about__pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.about__pillar {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.about__pillar-number {
  font-family: var(--font-primary);
  font-weight: var(--weight-medium);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-wider);
  color: var(--color-coral);
  display: block;
  margin-bottom: var(--space-md);
}

.about__pillar-title {
  font-family: var(--font-secondary);
  font-weight: var(--weight-bold);
  font-size: var(--text-h4);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.about__pillar-desc {
  font-size: var(--text-small);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
}


/* ══════════════════════════════════════════════════
   STATEMENT
   ══════════════════════════════════════════════════ */

.statement {
  padding: var(--space-section) 0;
  background: var(--color-bg-elevated);
}

.statement__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.statement__headline {
  font-family: var(--font-secondary);
  font-weight: var(--weight-bold);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.statement__rule {
  width: 48px;
  height: 2px;
  background: var(--color-coral);
  margin: var(--space-xl) 0;
}

.statement__sub {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
  max-width: 40ch;
  margin-bottom: var(--space-2xl);
}


/* ══════════════════════════════════════════════════
   CONTACT
   ══════════════════════════════════════════════════ */

.contact {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--color-border);
}

.contact__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.contact__headline {
  font-family: var(--font-secondary);
  font-weight: var(--weight-bold);
  font-size: var(--text-h2);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-md);
}

.contact__sub {
  font-size: clamp(1rem, 1.3vw, 1.125rem);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
  max-width: 32ch;
}

/* ─── Form ─── */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form__row--half {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form__label {
  display: block;
  font-family: var(--font-primary);
  font-weight: var(--weight-medium);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.form__input {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 0;
  color: var(--color-text);
  font-size: var(--text-body);
  transition: border-color var(--duration-fast) var(--ease-out);
  appearance: none;
  -webkit-appearance: none;
}

.form__input::placeholder {
  color: var(--color-text-dim);
}

.form__input:focus {
  outline: none;
  border-color: var(--color-text-muted);
}

/* Focus underline sweep */
.form__field {
  position: relative;
}

.form__field::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-coral);
  transition: width var(--duration-normal) var(--ease-out);
}

.form__field:focus-within::after {
  width: 100%;
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__submit {
  align-self: flex-start;
}

/* Form states */
.form.is-success .form__submit {
  background: var(--color-teal);
  pointer-events: none;
}

.form.is-error .form__input:invalid {
  border-color: var(--color-coral);
}

.form__status {
  font-size: var(--text-small);
  margin-top: var(--space-xs);
}

.form__status--success {
  color: var(--color-teal);
}

.form__status--error {
  color: var(--color-coral);
}


/* ══════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════ */

.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2xl);
}

.footer__tagline {
  font-size: var(--text-small);
  color: var(--color-text-dim);
  margin-top: var(--space-sm);
}

.footer__links {
  display: flex;
  gap: var(--space-3xl);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer__col a {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__col a:hover {
  color: var(--color-coral);
}

.footer__col p {
  font-size: var(--text-small);
  color: var(--color-text-dim);
}

.footer__col--right {
  text-align: right;
}

.footer__proof {
  color: var(--color-text-dim);
  font-style: italic;
}

.footer__bottom {
  max-width: var(--max-width);
  margin: var(--space-2xl) auto 0;
  padding: var(--space-lg) var(--gutter) 0;
  border-top: 1px solid var(--color-border);
}

.footer__bottom p {
  font-size: var(--text-micro);
  color: var(--color-text-dim);
}


/* ══════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════ */

/* Tablet */
@media (max-width: 1024px) {
  .about__pillars {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact__inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

/* Mobile */
@media (max-width: 640px) {
  .hero {
    padding-top: calc(var(--space-5xl) + 2rem);
    padding-bottom: var(--space-2xl);
    align-items: center;
  }

  .hero__scroll-hint {
    display: none;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .about__headline {
    max-width: none;
  }

  .about__pillars {
    grid-template-columns: 1fr;
  }

  .form__row--half {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .footer__links {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .footer__col--right {
    text-align: left;
  }
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .hero__scroll-hint span {
    animation: none;
  }
}