/*
  Mobile Performance Marketing Agency - minimal, responsive CSS
  System fonts, accessible contrast, fluid spacing scale, and simple grid.
*/

:root {
  --bg: #0b1220;
  --bg-alt: #0e172b;
  --panel: #0f172a;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --brand: #22d3ee;
  --brand-600: #06b6d4;
  --accent: #a78bfa;
  --ring: rgba(34, 211, 238, 0.35);

  --maxw: 1140px;
  --radius: 12px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg) 0%, #0a0f1c 100%);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Noto Sans, "Apple Color Emoji", "Segoe UI Emoji";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 18, 32, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.nav { display: flex; gap: var(--space-4); align-items: center; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--text); }

/* Hero */
.section { padding: var(--space-8) 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.00)); }
.hero { padding-top: calc(var(--space-8) + 24px); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-7);
  align-items: center;
}
.hero-copy h1 { font-size: clamp(28px, 5vw, 48px); line-height: 1.15; margin: 0 0 var(--space-4); }
.hero-copy p { color: var(--muted); margin: 0 0 var(--space-5); }
.hero-ctas { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.metrics { display: flex; gap: var(--space-6); padding: 0; margin: var(--space-6) 0 0; list-style: none; color: var(--muted); }
.metrics strong { color: #fff; }

.device-mock {
  position: relative;
  width: 100%;
  aspect-ratio: 9/16;
  border-radius: 28px;
  background: radial-gradient(120% 120% at 100% 0%, rgba(34,211,238,0.2), rgba(167,139,250,0.15) 40%, rgba(255,255,255,0.06) 70%, rgba(255,255,255,0.02) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 20px 50px rgba(0,0,0,0.35), inset 0 0 0 6px rgba(255,255,255,0.04);
}
.screen-gradient {
  position: absolute;
  inset: 10% 8%;
  border-radius: 20px;
  background: linear-gradient(140deg, rgba(34,211,238,0.25), rgba(167,139,250,0.2), rgba(34,211,238,0.12));
  filter: blur(0.5px);
}

/* Advanced emoji UI inside device mock */
.screen-ui {
  position: absolute;
  inset: 10% 8%;
  border-radius: 20px;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(34,211,238,0.10) 0%, transparent 60%),
    radial-gradient(100% 120% at 0% 100%, rgba(167,139,250,0.10) 0%, transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  backdrop-filter: blur(2px);
  border: 1px solid rgba(255,255,255,0.06);
  transform: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}

.notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 22px;
  background: rgba(0,0,0,0.35);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25) inset;
}

.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 0 12px;
  font-size: 12px;
  color: rgba(229,231,235,0.85);
}
.status-bar .time { letter-spacing: 0.2px; }

.app-header {
  display: grid;
  grid-template-columns: 32px 1fr 24px;
  align-items: center;
  gap: 10px;
  padding: 8px 12px 12px 12px;
}
.app-header .avatar {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(34,211,238,0.35), rgba(167,139,250,0.25));
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.app-header .title { display: grid; }
.app-header .title strong { font-size: 14px; }
.app-header .title span { font-size: 12px; color: var(--muted); }
.app-header .menu { text-align: right; color: var(--muted); }

.feed {
  display: grid;
  gap: 8px;
  padding: 0 12px;
}
.bubble {
  max-width: 80%;
  padding: 8px 10px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.4;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  position: relative;
}
.incoming { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08); }
.outgoing { background: rgba(34,211,238,0.18); border: 1px solid rgba(34,211,238,0.35); margin-left: auto; }

.dock {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 12px;
}
.pill {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(34,211,238,0.35);
  background: linear-gradient(180deg, rgba(34,211,238,0.35), rgba(6,182,212,0.35));
  color: #001018;
  font-weight: 700;
}
.reactions { display: flex; gap: 8px; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.25)); }
.reactions span { animation: float 6s ease-in-out infinite; will-change: transform; }
.reactions span:nth-child(2) { animation-delay: 0.5s; }
.reactions span:nth-child(3) { animation-delay: 1s; }
.reactions span:nth-child(4) { animation-delay: 1.5s; }
.reactions span:nth-child(5) { animation-delay: 2s; }

@keyframes float {
  0%, 100% { transform: translateY(0) translateZ(0) rotate(0); }
  25% { transform: translateY(-3px) rotate(-3deg); }
  50% { transform: translateY(-6px) rotate(3deg); }
  75% { transform: translateY(-3px) rotate(-2deg); }
}

/* Subtle shimmer passing through screen */
.screen-ui::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 0%, rgba(255,255,255,0.06) 20%, transparent 40%);
  transform: translateX(-100%);
  animation: shimmer 5.5s ease-in-out infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  60% { transform: translateX(120%); }
  100% { transform: translateX(120%); }
}

.logos { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-7); }
.logo-pill {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: var(--muted);
  font-size: 12px;
}

/* Cards */
.section-head { margin-bottom: var(--space-6); }
.section-head h2 { margin: 0 0 var(--space-3); font-size: clamp(22px, 4vw, 32px); }
.section-head p { margin: 0; color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.card h3 { margin: 0 0 var(--space-3); font-size: 18px; }
.card p { margin: 0 0 var(--space-3); color: var(--muted); }
.card ul { margin: 0; padding-left: 18px; color: var(--muted); }

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.study {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.bullets { margin: var(--space-3) 0 0; color: var(--muted); padding-left: 18px; }

/* Quotes */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.quote { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius); padding: var(--space-5); }
.quote blockquote { margin: 0 0 var(--space-3); font-size: 16px; }
.quote figcaption { color: var(--muted); font-size: 14px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-5); }
.contact-form { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius); padding: var(--space-5); }
.field { display: grid; gap: 6px; margin-bottom: var(--space-4); }
.field label { color: var(--muted); font-size: 14px; }
.field input, .field textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.02);
  color: var(--text);
  outline: none;
}
.field input:focus, .field textarea:focus { box-shadow: 0 0 0 4px var(--ring); border-color: var(--brand-600); }
.footnote { color: var(--muted); font-size: 14px; }
.contact-aside { display: grid; align-content: start; gap: var(--space-4); }
.highlights { display: grid; gap: 10px; }
.highlight { display: flex; justify-content: space-between; gap: var(--space-3); padding: 10px 12px; border-radius: 10px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); }
.highlight strong { color: var(--text); }
.highlight span { color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid rgba(255,255,255,0.08); padding: var(--space-6) 0; background: rgba(0,0,0,0.25); }
.footer-inner { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: var(--space-4); }
.footer-nav { display: flex; gap: var(--space-4); justify-content: center; }
.copyright { text-align: right; color: var(--muted); margin: 0; font-size: 14px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 10px; text-decoration: none; cursor: pointer; border: 1px solid transparent; }
.btn-sm { padding: 8px 12px; font-size: 14px; }
.btn-primary { background: linear-gradient(180deg, var(--brand), var(--brand-600)); color: #001018; font-weight: 700; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { color: var(--text); border-color: rgba(255,255,255,0.14); background: rgba(255,255,255,0.02); }
.btn-ghost:hover { background: rgba(255,255,255,0.05); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .quotes { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .copyright { text-align: center; }
}
@media (max-width: 640px) {
  .nav a:not(.btn) { display: none; }
  .cards { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  .quotes { grid-template-columns: 1fr; }
  .metrics { gap: var(--space-4); }
}