/* ═══════════════════════════════════════════════════════════════════════
   ROVA — style.css
   Mobile-first. No frameworks. Clean, fast, purposeful.
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Custom properties ─────────────────────────────────────────────────── */
:root {
  /* Colours — Rova brand palette */
  --color-teal:      #0a9e8f;
  --color-teal-dark: #077a6f;
  --color-teal-dim:  #22d3bb;
  --color-lime:      #b8e04a;
  --color-navy:      #061420;
  --color-navy-mid:  #0a2a3c;
  --color-navy-light:#0a4a5c;
  --color-charcoal:  #1a2630;
  --color-body:      #374151;
  --color-muted:     #6b7280;
  --color-border:    #e5e7eb;
  --color-bg:        #ffffff;
  --color-bg-alt:    #f8fafc;

  /* Typography */
  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm:  0.375rem;
  --radius-md:  0.75rem;
  --radius-lg:  1rem;
  --radius-xl:  1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: 200ms ease;
  --transition-slow: 400ms ease;

  /* Container */
  --container: 72rem;
  --container-pad: 1.25rem;
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-body);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font: inherit; }
ul { list-style: none; }

/* ── Utility ────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-20);
}

.section__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-charcoal);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section__body {
  font-size: var(--text-lg);
  color: var(--color-muted);
  max-width: 58ch;
  line-height: 1.7;
}

.section__header { margin-bottom: var(--space-12); }
.section__header--center { text-align: center; }
.section__header--center .section__body { margin-inline: auto; }

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: 600;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-teal);
  color: #fff;
  border: 2px solid var(--color-teal);
}
.btn--primary:hover {
  background: var(--color-teal-dark);
  border-color: var(--color-teal-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(30,158,140,.35);
}

.btn--ghost {
  background: transparent;
  color: rgba(255,255,255,0.85);
  border: 2px solid rgba(255,255,255,0.25);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.5);
}

.btn--outline {
  background: transparent;
  color: var(--color-teal);
  border: 2px solid var(--color-teal);
}
.btn--outline:hover {
  background: var(--color-teal);
  color: #fff;
}

.btn--sm { padding: 0.5rem 1.125rem; font-size: var(--text-sm); }
.btn--full { width: 100%; }

/* ══════════════════════════════════════════════════════════════════════════
   NAV
   ══════════════════════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition),
              backdrop-filter var(--transition);
}

.nav--scrolled {
  background: rgba(6, 20, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(30,158,140,0.2);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 4rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  margin-right: auto;
  flex-shrink: 0;
  line-height: 1;
}

.nav__links {
  display: none;
  gap: var(--space-6);
}
.nav__links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}
.nav__links a:hover { color: #fff; }

.nav__cta { flex-shrink: 0; }

.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  padding: 2px;
  margin-left: auto;
}
.nav__hamburger span {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.nav__mobile {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) var(--container-pad);
  background: rgba(6, 20, 32, 0.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(30,158,140,0.2);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}
.nav__mobile.is-open {
  max-height: 20rem;
  padding: var(--space-6) var(--container-pad);
}
.nav__mobile-link {
  font-size: var(--text-lg);
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  padding-block: var(--space-2);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: color var(--transition);
}
.nav__mobile-link:hover { color: var(--color-teal-dim); }
.nav__mobile-cta { margin-top: var(--space-3); align-self: flex-start; }

@media (min-width: 768px) {
  .nav__links { display: flex; }
  .nav__hamburger { display: none; }
  .nav__mobile { display: none !important; }
}

/* ══════════════════════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-navy);
  color: #fff;
  padding-top: 6rem;
  padding-bottom: var(--space-20);
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30,158,140,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,158,140,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero__glow--1 {
  width: 40vw; height: 40vw;
  top: -10%; left: -10%;
  background: radial-gradient(circle, rgba(30,158,140,0.18), transparent 70%);
}
.hero__glow--2 {
  width: 50vw; height: 50vw;
  bottom: -20%; right: -15%;
  background: radial-gradient(circle, rgba(13,110,97,0.15), transparent 70%);
}

.hero__scooter-art {
  position: absolute;
  right: -2%;
  bottom: 0;
  width: min(55%, 500px);
  opacity: 0.55;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  background: rgba(30,158,140,0.12);
  border: 1px solid rgba(30,158,140,0.3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-teal-dim);
  margin-bottom: var(--space-6);
}

.hero__headline {
  font-size: clamp(var(--text-3xl), 6vw, var(--text-6xl));
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: var(--space-6);
}

.hero__sub {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
  max-width: 52ch;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ══════════════════════════════════════════════════════════════════════════
   ABOUT
   ══════════════════════════════════════════════════════════════════════════ */
.about {
  background: var(--color-bg);
}

.tiles {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.tile {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), transform var(--transition);
}
.tile:hover {
  box-shadow: 0 8px 32px rgba(30,158,140,0.1);
  transform: translateY(-2px);
}

.tile__icon {
  width: 2.75rem;
  height: 2.75rem;
  color: var(--color-teal);
  margin-bottom: var(--space-4);
}

.tile__heading {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: var(--space-2);
}

.tile__body {
  color: var(--color-muted);
  line-height: 1.65;
}

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

/* ══════════════════════════════════════════════════════════════════════════
   VISION
   ══════════════════════════════════════════════════════════════════════════ */
.vision {
  background: var(--color-navy);
  color: #fff;
  overflow: hidden;
  position: relative;
}

.vision::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30,158,140,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,158,140,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.vision .section__title { color: #fff; }
.vision .section__body  { color: rgba(255,255,255,0.6); }

.phases {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: stretch;
}

.phases__arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--color-teal);
}
.phases__arrow svg {
  width: 2.5rem;
  height: 2.5rem;
  transform: rotate(90deg);
}

.phase {
  flex: 1;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(30,158,140,0.2);
  position: relative;
  overflow: hidden;
}
.phase--tomorrow {
  border-color: rgba(30,158,140,0.4);
  background: rgba(30,158,140,0.06);
}

.phase__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-teal);
  background: rgba(30,158,140,0.12);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}
.phase__tag--future {
  color: var(--color-teal-dim);
  background: rgba(34,211,187,0.12);
}

.phase__visual {
  margin-bottom: var(--space-6);
  width: 100%;
  max-width: 260px;
}

.phase__heading {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.phase__body {
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.phase__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.phase__list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
}
.phase__list li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-teal);
  flex-shrink: 0;
}

@media (min-width: 900px) {
  .phases {
    flex-direction: row;
    align-items: flex-start;
  }
  .phases__arrow svg {
    transform: rotate(0deg);
  }
  .phases__arrow {
    padding-top: var(--space-20);
    flex-shrink: 0;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   CONTACT
   ══════════════════════════════════════════════════════════════════════════ */
.contact {
  background: var(--color-bg-alt);
}

.contact__inner {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: 1fr;
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-teal);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-top: var(--space-4);
  transition: color var(--transition);
}
.contact__email:hover { color: var(--color-teal-dark); }

.contact__form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

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

.form__group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-charcoal);
}

.form__group input,
.form__group select {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-charcoal);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form__group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M6 8l4 4 4-4' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form__group input:focus,
.form__group select:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(30,158,140,0.12);
}

.form__group input::placeholder { color: var(--color-muted); }

.form__error {
  display: block;
  font-size: var(--text-xs);
  color: #f87171;
  margin-top: 0.25rem;
  min-height: 1em;
}

.form__group input.input--error,
.form__group select.input--error {
  border-color: #f87171;
  outline-color: #f87171;
}

.form__note {
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-align: center;
  margin-top: var(--space-1);
}

@media (min-width: 900px) {
  .contact__inner {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  .contact__copy { padding-top: var(--space-6); }
}

/* ══════════════════════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════════════════════ */
.footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.6);
  padding-top: var(--space-12);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

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

.footer__logo {
  display: flex;
  align-items: center;
  line-height: 1;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-teal);
  font-weight: 500;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}
.footer__links a:hover { color: #fff; }

.footer__social-placeholder {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
  font-style: italic;
}

.footer__bottom {
  padding-block: var(--space-4);
  text-align: center;
}
.footer__bottom p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.3);
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   RESPONSIVE POLISH
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .btn--ghost { display: none; }
}

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