/* ============================================================
   RBMD · Design & Development Studio
   ============================================================ */

:root {
  /* Brand */
  --cyan: #22b8f0;
  --cyan-bright: #4fd0ff;
  --blue: #0b57a6;
  --blue-deep: #0a3d7a;

  /* Surfaces */
  --bg: #080b14;
  --bg-2: #0b1020;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* Text */
  --fg: #eef2f8;
  --fg-soft: #aeb8cb;
  --fg-dim: #71809a;

  /* Effects */
  --grad: linear-gradient(100deg, var(--cyan-bright) 0%, var(--cyan) 35%, var(--blue) 100%);
  --grad-soft: linear-gradient(135deg, rgba(34, 184, 240, 0.15), rgba(11, 87, 166, 0.12));
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 0 1px var(--border), 0 30px 70px -30px rgba(34, 184, 240, 0.35);

  --radius: 18px;
  --radius-lg: 26px;
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  font-size: 17px;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

/* ---------- Decorative background ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
.bg-orb {
  position: fixed; z-index: -1; border-radius: 50%;
  filter: blur(120px); opacity: 0.5; pointer-events: none;
}
.bg-orb--1 {
  width: 620px; height: 620px; top: -240px; left: -160px;
  background: radial-gradient(circle, rgba(34, 184, 240, 0.55), transparent 70%);
  animation: float1 18s ease-in-out infinite;
}
.bg-orb--2 {
  width: 540px; height: 540px; top: 8%; right: -200px;
  background: radial-gradient(circle, rgba(11, 87, 166, 0.6), transparent 70%);
  animation: float2 22s ease-in-out infinite;
}
@keyframes float1 { 50% { transform: translate(60px, 70px) scale(1.1); } }
@keyframes float2 { 50% { transform: translate(-70px, 50px) scale(1.08); } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 15px; letter-spacing: 0.01em;
  padding: 12px 22px; border-radius: 999px; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}
.btn--lg { padding: 15px 30px; font-size: 16px; }
.btn--primary {
  background: var(--grad); color: #04121f; font-weight: 700;
  box-shadow: 0 10px 30px -10px rgba(34, 184, 240, 0.6);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -12px rgba(34, 184, 240, 0.75); }
.btn--ghost { background: var(--surface); border-color: var(--border-strong); color: var(--fg); }
.btn--ghost:hover { transform: translateY(-2px); background: var(--surface-2); border-color: var(--cyan); }

/* ---------- Eyebrow ---------- */
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.18em; color: var(--cyan-bright);
  margin-bottom: 18px;
}

.grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(8, 11, 20, 0.55);
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s;
}
.nav.is-scrolled { background: rgba(8, 11, 20, 0.82); border-bottom-color: var(--border); }
.nav__inner { display: flex; align-items: center; gap: 24px; height: 72px; }
.nav__brand { display: flex; align-items: center; }
.nav__logo { height: 26px; width: auto; }
.nav__links { display: flex; gap: 30px; margin-left: auto; }
.nav__links a { font-size: 15px; color: var(--fg-soft); font-weight: 500; position: relative; transition: color 0.2s; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: var(--grad); transition: width 0.25s var(--ease);
}
.nav__links a:hover { color: var(--fg); }
.nav__links a:hover::after { width: 100%; }
.nav__cta { margin-left: 4px; }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__toggle span { width: 24px; height: 2px; background: var(--fg); border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.nav__mobile { display: none; flex-direction: column; gap: 6px; padding: 12px 24px 20px; border-bottom: 1px solid var(--border); background: rgba(8, 11, 20, 0.96); }
.nav__mobile a { padding: 12px 4px; color: var(--fg-soft); border-bottom: 1px solid var(--border); font-weight: 500; }
.nav__mobile a:last-child { border: 0; margin-top: 8px; }

/* ---------- Hero ---------- */
.hero { padding: clamp(70px, 13vw, 150px) 0 clamp(60px, 9vw, 110px); }
.hero__inner { max-width: 880px; }
.hero__title { font-size: clamp(2.6rem, 7.2vw, 5.2rem); font-weight: 700; margin-bottom: 26px; }
.hero__lead { font-size: clamp(1.05rem, 2.1vw, 1.3rem); color: var(--fg-soft); max-width: 640px; margin-bottom: 36px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
.hero__meta { display: flex; flex-wrap: wrap; gap: 26px; list-style: none; }
.hero__meta li { display: flex; align-items: center; gap: 9px; color: var(--fg-dim); font-size: 14.5px; font-weight: 500; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 12px var(--cyan); }

/* ---------- Stats ---------- */
.stats { padding-bottom: clamp(40px, 6vw, 70px); }
.stats__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  padding: 30px; border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--grad-soft); backdrop-filter: blur(8px);
}
.stat { text-align: center; padding: 8px; }
.stat__num { display: block; font-family: "Space Grotesk", sans-serif; font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat__label { display: block; font-size: 13.5px; color: var(--fg-soft); margin-top: 4px; }

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 10vw, 120px) 0; }
.section__head { max-width: 660px; margin-bottom: 54px; }
.section__title { font-size: clamp(1.9rem, 4.4vw, 3rem); margin-bottom: 16px; }
.section__sub { color: var(--fg-soft); font-size: 1.07rem; }

/* ---------- Service cards ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  padding: 30px 26px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); transition: transform 0.3s var(--ease), border-color 0.3s, background 0.3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: 0;
  background: var(--grad-soft); transition: opacity 0.3s; z-index: -1;
}
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.card:hover::before { opacity: 1; }
.card__icon {
  width: 50px; height: 50px; display: grid; place-items: center; margin-bottom: 18px;
  border-radius: 14px; background: var(--grad-soft); border: 1px solid var(--border);
  font-size: 22px; color: var(--cyan-bright); font-family: "Space Grotesk", sans-serif;
}
.card h3 { font-size: 1.22rem; margin-bottom: 9px; }
.card p { color: var(--fg-soft); font-size: 14.8px; }

/* ---------- Logo grid (web work) ---------- */
.logo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.logo-card {
  display: flex; flex-direction: column; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; background: var(--surface);
  transition: transform 0.35s var(--ease), border-color 0.3s, box-shadow 0.35s;
}
.logo-card:hover { transform: translateY(-8px); border-color: var(--cyan); box-shadow: var(--shadow-glow); }
.logo-card__media {
  height: 168px; display: grid; place-items: center; padding: 34px;
  background: radial-gradient(circle at 50% 40%, #ffffff, #eef1f5);
}
.logo-card__media img { max-height: 100%; max-width: 100%; width: auto; object-fit: contain; filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.08)); }
.logo-card__mono {
  font-family: "Space Grotesk", sans-serif; font-weight: 700; font-size: 2.6rem; letter-spacing: 0.04em;
  color: #1a2230; background: linear-gradient(135deg, #2c3442, #11161f);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.logo-card__body { padding: 22px 22px 24px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 7px; flex: 1; }
.logo-card__body h3 { font-size: 1.18rem; }
.logo-card__body p { color: var(--fg-soft); font-size: 14.5px; flex: 1; }
.logo-card__link { font-size: 13.5px; font-weight: 600; color: var(--cyan-bright); margin-top: 6px; transition: transform 0.25s var(--ease); }
.logo-card:hover .logo-card__link { transform: translateX(4px); }

/* ---------- App cards ---------- */
.app-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.app-card {
  display: flex; gap: 26px; padding: 32px; border: 1px solid var(--border);
  border-radius: var(--radius-lg); background: var(--surface);
  transition: transform 0.35s var(--ease), border-color 0.3s, box-shadow 0.35s;
}
.app-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.app-card__icon { flex-shrink: 0; }
.app-card__icon img { width: 92px; height: 92px; border-radius: 22px; box-shadow: 0 14px 34px -10px rgba(0, 0, 0, 0.6); border: 1px solid var(--border); }
.app-card__topline { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }
.app-card__topline h3 { font-size: 1.55rem; }
.badge {
  font-size: 11.5px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 5px 11px; border-radius: 999px; color: var(--cyan-bright);
  background: var(--grad-soft); border: 1px solid var(--border);
}
.app-card__tag { font-family: "Space Grotesk", sans-serif; font-size: 1.05rem; color: var(--fg); margin-bottom: 10px; font-weight: 500; }
.app-card__body > p { color: var(--fg-soft); font-size: 15px; }
.app-card__features { list-style: none; margin: 16px 0 18px; display: flex; flex-direction: column; gap: 9px; }
.app-card__features li { position: relative; padding-left: 24px; font-size: 14.3px; color: var(--fg-soft); }
.app-card__features li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--cyan-bright); font-weight: 700;
}
.app-card__link { font-size: 14px; font-weight: 600; color: var(--cyan-bright); transition: transform 0.25s var(--ease); display: inline-block; }
.app-card:hover .app-card__link { transform: translateX(4px); }

/* ---------- About ---------- */
.about__inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.about__copy p { color: var(--fg-soft); margin-bottom: 18px; }
.about__copy .btn { margin-top: 10px; }
.about__list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.about__list li {
  padding: 20px 22px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); color: var(--fg-soft); font-size: 15px;
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.about__list li:hover { border-color: var(--cyan); transform: translateX(6px); }
.about__list strong { color: var(--fg); font-weight: 600; }

/* ---------- Contact ---------- */
.contact__card {
  text-align: center; padding: clamp(48px, 8vw, 88px) 32px;
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse 70% 130% at 50% 0%, rgba(34, 184, 240, 0.16), transparent 70%),
    var(--surface);
  position: relative; overflow: hidden;
}
.contact__title { font-size: clamp(2rem, 5vw, 3.2rem); margin-bottom: 14px; }
.contact__sub { color: var(--fg-soft); max-width: 480px; margin: 0 auto 30px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding-top: 56px; margin-top: 30px; }
.footer__inner { display: grid; grid-template-columns: 1.3fr 2fr; gap: 40px; padding-bottom: 40px; }
.footer__logo { height: 24px; margin-bottom: 14px; }
.footer__brand p { color: var(--fg-dim); font-size: 14.5px; max-width: 280px; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer__cols h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--fg-dim); margin-bottom: 14px; font-family: "Inter", sans-serif; font-weight: 600; }
.footer__cols a { display: block; color: var(--fg-soft); font-size: 14.5px; padding: 5px 0; transition: color 0.2s; }
.footer__cols a:hover { color: var(--cyan-bright); }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border); padding-block: 22px 30px; color: var(--fg-dim); font-size: 13.5px;
}
.footer__top { transition: color 0.2s; }
.footer__top:hover { color: var(--cyan-bright); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .logo-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: 1fr; }
  .about__inner { grid-template-columns: 1fr; gap: 36px; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (max-width: 760px) {
  .nav__links, .nav__cta { display: none; }
  .nav__toggle { display: flex; margin-left: auto; }
  .nav.is-open .nav__mobile { display: flex; }
  .nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; gap: 12px; }
  .app-card { flex-direction: column; gap: 18px; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .cards, .logo-grid { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: 1fr 1fr; padding: 24px 16px; }
  .container { padding-inline: 18px; }
}