/* ==========================================================================
   GaGa Chat — Informational Site
   A static, marketing/information-only site that replaces the retired web app.
   ========================================================================== */

:root {
  --brand: #00c300;
  --brand-dark: #00a300;
  --brand-deep: #008800;
  --ink: #0b0b0f;
  --ink-soft: #1a1a22;
  --text: #1c1c22;
  --text-muted: #5c5c6b;
  --surface: #ffffff;
  --surface-alt: #f6f8f6;
  --border: #e6e9e6;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 2px rgba(11, 11, 15, 0.06), 0 2px 8px rgba(11, 11, 15, 0.04);
  --shadow-md: 0 8px 30px rgba(11, 11, 15, 0.08);
  --shadow-lg: 0 24px 60px rgba(11, 11, 15, 0.12);
  --maxw: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", "Noto Sans Bengali", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--surface);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--brand-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  font-size: 1.18rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.nav a:hover {
  color: var(--brand-dark);
  text-decoration: none;
}

.nav .btn {
  color: #fff;
}

.nav .btn:hover {
  color: #fff;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #fff;
  box-shadow: 0 10px 26px rgba(0, 195, 0, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 14px 34px rgba(0, 195, 0, 0.36);
}

.btn-ghost {
  background: #fff;
  border-color: var(--border);
  color: var(--ink);
}

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

.btn-dark {
  background: var(--ink);
  color: #fff;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 84px 0 72px;
  background: radial-gradient(1200px 520px at 78% -8%, rgba(0, 195, 0, 0.16), transparent 62%),
    radial-gradient(900px 460px at 8% 8%, rgba(0, 195, 0, 0.08), transparent 60%),
    linear-gradient(180deg, #f4fbf4 0%, #ffffff 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: rgba(0, 195, 0, 0.1);
  border: 1px solid rgba(0, 195, 0, 0.22);
  color: var(--brand-deep);
  border-radius: 999px;
  padding: 7px 15px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 22px;
}

.pill .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(0, 195, 0, 0.18);
}

.hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  color: var(--ink);
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.lead {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.hero-note {
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone {
  width: 290px;
  border-radius: 40px;
  background: var(--ink);
  padding: 12px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.phone-screen {
  border-radius: 30px;
  overflow: hidden;
  background: linear-gradient(160deg, #0f1a0f 0%, #0b0b0f 100%);
  aspect-ratio: 9 / 19;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 26px;
  text-align: center;
}

.phone-screen img {
  width: 84px;
  height: 84px;
  border-radius: 24px;
  box-shadow: 0 12px 30px rgba(0, 195, 0, 0.35);
}

.phone-screen .app-name {
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.phone-screen .app-tag {
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.82rem;
}

.phone-screen .mini-btn {
  margin-top: 6px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #fff;
  border-radius: 999px;
  padding: 11px 22px;
  font-size: 0.85rem;
  font-weight: 700;
}

/* ---------- Stats ---------- */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface-alt);
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 34px;
  padding-bottom: 34px;
}

.stat {
  text-align: center;
}

.stat .value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--brand-deep);
  letter-spacing: -0.02em;
}

.stat .label {
  font-size: 0.86rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ---------- Sections ---------- */
section {
  padding: 78px 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  letter-spacing: -0.025em;
  margin: 0 0 14px;
  color: var(--ink);
}

.section-head p {
  color: var(--text-muted);
  font-size: 1.02rem;
  margin: 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--brand-dark);
  margin-bottom: 12px;
}

/* ---------- Feature grid ---------- */
.grid {
  display: grid;
  gap: 22px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 195, 0, 0.35);
}

.card .icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 195, 0, 0.1);
  color: var(--brand-deep);
  margin-bottom: 16px;
}

.card .icon svg {
  width: 23px;
  height: 23px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.06rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* ---------- Specs table ---------- */
.specs {
  background: var(--surface-alt);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 15px 22px;
  font-size: 0.93rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.spec-table th {
  width: 34%;
  color: var(--ink);
  font-weight: 700;
  background: #fbfdfb;
}

.spec-table td {
  color: var(--text-muted);
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: none;
}

/* ---------- Steps ---------- */
.steps {
  counter-reset: step;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}

.step:last-child {
  border-bottom: none;
}

.step .num {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0, 195, 0, 0.28);
}

.step h3 {
  margin: 4px 0 6px;
  font-size: 1.05rem;
  color: var(--ink);
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.94rem;
}

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(135deg, #0b0b0f 0%, #10240f 100%);
  color: #fff;
  text-align: center;
  border-radius: 0;
}

.cta h2 {
  color: #fff;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  margin: 0 0 14px;
  letter-spacing: -0.025em;
}

.cta p {
  color: rgba(255, 255, 255, 0.72);
  max-width: 620px;
  margin: 0 auto 30px;
}

.cta .btn-primary {
  box-shadow: 0 14px 40px rgba(0, 195, 0, 0.4);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.66);
  padding: 54px 0 30px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 34px;
  margin-bottom: 38px;
}

.site-footer .brand {
  color: #fff;
  margin-bottom: 14px;
}

.site-footer h4 {
  color: #fff;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 14px;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li {
  margin-bottom: 9px;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.66);
}

.site-footer a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.84rem;
}

/* ---------- Legal / prose pages ---------- */
.prose {
  max-width: 820px;
  margin: 0 auto;
}

.prose h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0 0 10px;
}

.prose h2 {
  font-size: 1.3rem;
  color: var(--ink);
  margin: 38px 0 12px;
  letter-spacing: -0.015em;
}

.prose p,
.prose li {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.prose ul {
  padding-left: 22px;
}

.prose .updated {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-visual {
    order: -1;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 680px) {
  .nav {
    display: none;
  }

  .stats .container {
    grid-template-columns: repeat(2, 1fr);
    gap: 26px;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

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

  section {
    padding: 58px 0;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .spec-table th {
    width: 42%;
  }
}

@media print {
  .site-header,
  .cta,
  .site-footer {
    display: none;
  }
}