/* ===== Light theme (default) ===== */
:root {
  --bg: #f5f5f7;
  --bg-card: rgba(0, 0, 0, 0.03);
  --bg-card-hover: rgba(0, 0, 0, 0.06);
  --text: #1a1a2e;
  --text-dim: #555770;
  --text-muted: #9496a8;
  --accent: #0a9e7a;
  --accent-blue: #0066cc;
  --accent-dim: rgba(10, 158, 122, 0.1);
  --accent-badge-border: rgba(10, 158, 122, 0.25);
  --border: rgba(0, 0, 0, 0.08);
  --code-bg: rgba(10, 158, 122, 0.08);
  --code-border: rgba(10, 158, 122, 0.18);
  --glow-1: rgba(10, 158, 122, 0.06);
  --glow-2: rgba(0, 102, 204, 0.04);
  --btn-text: #fff;
  --nav-bg: rgba(245, 245, 247, 0.85);
  --pulse-ring: rgba(10, 158, 122, 0.3);
  --demo-bg: rgba(0, 0, 0, 0.03);
  --demo-border: rgba(0, 0, 0, 0.07);
  --step-num-color: rgba(10, 158, 122, 0.15);
  --install-card-bg: linear-gradient(135deg, rgba(10,158,122,0.06), rgba(0,102,204,0.04));
  --install-card-border: rgba(10, 158, 122, 0.2);
  --radius: 12px;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'SF Mono', monospace;
}

/* ===== Dark theme ===== */
[data-theme="dark"] {
  --bg: #0c0d12;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --text: #e8e9ed;
  --text-dim: #9a9cb5;
  --text-muted: #5a5c72;
  --accent: #12dba6;
  --accent-blue: #339dff;
  --accent-dim: rgba(18, 219, 166, 0.1);
  --accent-badge-border: rgba(18, 219, 166, 0.25);
  --border: rgba(255, 255, 255, 0.07);
  --code-bg: rgba(18, 219, 166, 0.08);
  --code-border: rgba(18, 219, 166, 0.16);
  --glow-1: rgba(18, 219, 166, 0.07);
  --glow-2: rgba(51, 157, 255, 0.05);
  --btn-text: #0c0d12;
  --nav-bg: rgba(12, 13, 18, 0.85);
  --pulse-ring: rgba(18, 219, 166, 0.35);
  --demo-bg: rgba(255, 255, 255, 0.03);
  --demo-border: rgba(255, 255, 255, 0.07);
  --step-num-color: rgba(18, 219, 166, 0.12);
  --install-card-bg: linear-gradient(135deg, rgba(18,219,166,0.07), rgba(51,157,255,0.04));
  --install-card-border: rgba(18, 219, 166, 0.2);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0d12;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --text: #e8e9ed;
    --text-dim: #9a9cb5;
    --text-muted: #5a5c72;
    --accent: #12dba6;
    --accent-blue: #339dff;
    --accent-dim: rgba(18, 219, 166, 0.1);
    --accent-badge-border: rgba(18, 219, 166, 0.25);
    --border: rgba(255, 255, 255, 0.07);
    --code-bg: rgba(18, 219, 166, 0.08);
    --code-border: rgba(18, 219, 166, 0.16);
    --glow-1: rgba(18, 219, 166, 0.07);
    --glow-2: rgba(51, 157, 255, 0.05);
    --btn-text: #0c0d12;
    --nav-bg: rgba(12, 13, 18, 0.85);
    --pulse-ring: rgba(18, 219, 166, 0.35);
    --demo-bg: rgba(255, 255, 255, 0.03);
    --demo-border: rgba(255, 255, 255, 0.07);
    --step-num-color: rgba(18, 219, 166, 0.12);
    --install-card-bg: linear-gradient(135deg, rgba(18,219,166,0.07), rgba(51,157,255,0.04));
    --install-card-border: rgba(18, 219, 166, 0.2);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--code-bg);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--code-border);
  white-space: nowrap;
}

/* ===== Noise + glows ===== */
.noise {
  position: fixed; inset: 0; z-index: 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;
}

.glow {
  position: fixed; border-radius: 50%;
  filter: blur(120px); pointer-events: none; z-index: 0;
  transition: background 0.5s ease;
}

.glow-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, var(--glow-1), transparent 70%);
  top: -200px; right: -100px;
  animation: drift1 20s ease-in-out infinite;
}

.glow-2 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--glow-2), transparent 70%);
  bottom: 0; left: -100px;
  animation: drift2 25s ease-in-out infinite;
}

@keyframes drift1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-60px, 40px); }
}
@keyframes drift2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, -50px); }
}

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.nav-inner {
  max-width: 1080px; margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex; align-items: center; gap: 24px;
}

.nav-logo {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem; font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text);
  flex-shrink: 0;
}

.nav-logo-icon { width: 18px; height: 18px; color: var(--accent); }

.nav-links {
  display: flex; align-items: center; gap: 8px;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.88rem; font-weight: 400;
  color: var(--text-dim);
  padding: 6px 12px; border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover { color: var(--text); background: var(--bg-card); }

.nav-cta {
  background: var(--accent-dim) !important;
  color: var(--accent) !important;
  border: 1px solid var(--accent-badge-border);
  font-weight: 500 !important;
}

.nav-cta:hover { background: rgba(10,158,122,0.18) !important; }

.theme-toggle {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; cursor: pointer;
  color: var(--text-dim);
  transition: background 0.2s ease, color 0.2s ease;
}
.theme-toggle:hover { background: var(--bg-card-hover); color: var(--text); }
.theme-toggle svg { width: 16px; height: 16px; }

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* ===== Section layout ===== */
.section-inner {
  position: relative; z-index: 1;
  max-width: 1080px; margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 14px;
}

/* ===== Hero ===== */
.hero {
  position: relative; z-index: 1;
  padding: 100px 0 80px;
}

.hero-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 24px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 10px;
  background: var(--accent-dim);
  border: 1px solid var(--accent-badge-border);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500; letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 32px;
  animation: fadeInDown 0.6s ease-out both;
}

.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent); border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--pulse-ring); }
  50% { opacity: 0.7; box-shadow: 0 0 0 6px transparent; }
}

h1 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 700px;
}

.hero-line {
  display: block;
  font-size: clamp(3.5rem, 8vw, 6rem);
  opacity: 0;
  animation: fadeInUp 0.7s ease-out forwards;
}

.hero-line-1 { animation-delay: 0.1s; }
.hero-line-2 { animation-delay: 0.25s; }
.hero-line-3 {
  animation-delay: 0.4s;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-line-3 em { font-style: italic; }

.hero-sub {
  margin-top: 28px;
  font-size: 1.2rem; line-height: 1.7;
  color: var(--text-dim); max-width: 560px;
  opacity: 0;
  animation: fadeInUp 0.7s ease-out 0.55s forwards;
}

.hero-actions {
  margin-top: 36px;
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.7s ease-out 0.7s forwards;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--accent), var(--accent-blue));
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem; font-weight: 600;
  color: var(--btn-text);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative; overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.15) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.btn-primary:hover::before { transform: translateX(100%); }
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(10,158,122,0.2);
}
.btn-primary svg { width: 18px; height: 18px; }

.btn-ghost {
  display: inline-flex; align-items: center;
  padding: 14px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem; font-weight: 400;
  color: var(--text-dim);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); background: var(--bg-card); }

/* ===== Hero email demo ===== */
.hero-email-demo {
  margin-top: 56px;
  background: var(--demo-bg);
  border: 1px solid var(--demo-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  max-width: 680px;
  opacity: 0;
  animation: fadeInUp 0.7s ease-out 0.9s forwards;
}

.demo-label {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500; letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.demo-addresses { display: flex; flex-direction: column; gap: 10px; }

.demo-addr {
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
}

.demo-site {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  min-width: 110px;
}

.demo-arrow { color: var(--text-muted); font-size: 0.9rem; }

.demo-addr code {
  font-size: 0.82rem;
}

/* ===== How it works ===== */
.how {
  position: relative; z-index: 1;
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1.05rem; line-height: 1.7;
  color: var(--text-dim); max-width: 520px;
  margin-bottom: 56px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 640px;
}

.step {
  display: flex; gap: 24px;
  align-items: flex-start;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 2.5rem; font-weight: 300;
  color: var(--step-num-color);
  line-height: 1;
  flex-shrink: 0;
  width: 56px;
  padding-top: 4px;
}

.step-content h3 {
  font-family: var(--font-body);
  font-size: 1.1rem; font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.step-content p {
  font-size: 0.95rem; line-height: 1.7;
  color: var(--text-dim);
}

.step-connector {
  width: 1px; height: 40px;
  background: var(--border);
  margin-left: 27px;
}

/* ===== Features ===== */
.features {
  position: relative; z-index: 1;
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.features h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.feature-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim);
  border-radius: 10px;
  margin-bottom: 16px;
  color: var(--accent);
}
.feature-icon svg { width: 20px; height: 20px; }

.feature-card h3 {
  font-size: 1rem; font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 0.9rem; line-height: 1.65;
  color: var(--text-dim);
}

/* ===== Providers ===== */
.providers {
  position: relative; z-index: 1;
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.providers-label {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500; letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.providers-list {
  display: flex; flex-wrap: wrap; gap: 8px;
}

.provider-pill {
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.85rem; font-weight: 400;
  color: var(--text-dim);
}

.provider-pill-more {
  border-color: var(--accent-badge-border);
  background: var(--accent-dim);
  color: var(--accent);
}

/* ===== Install CTA ===== */
.install {
  position: relative; z-index: 1;
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.install-card {
  background: var(--install-card-bg);
  border: 1px solid var(--install-card-border);
  border-radius: 20px;
  padding: 64px 48px;
  text-align: center;
}

.install-shield {
  width: 72px; margin: 0 auto 28px;
  animation: shieldAppear 0.6s ease-out both;
}
.install-shield svg { width: 100%; height: auto; }

.check-path {
  stroke-dasharray: 40; stroke-dashoffset: 40;
  animation: drawCheck 0.5s ease-out 0.4s forwards;
}
@keyframes drawCheck { to { stroke-dashoffset: 0; } }
@keyframes shieldAppear {
  from { transform: scale(0.6); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.install-card h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400; margin-bottom: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.install-card > p {
  font-size: 1rem; line-height: 1.7;
  color: var(--text-dim);
  margin-bottom: 36px;
}

.install-buttons {
  display: flex; justify-content: center; gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.install-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem; font-weight: 500;
  color: var(--text);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.install-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-badge-border);
  color: var(--accent);
  transform: translateY(-1px);
}
.browser-icon { width: 18px; height: 18px; }

.install-note {
  font-family: var(--font-mono);
  font-size: 0.75rem; letter-spacing: 0.04em;
  color: var(--text-muted);
}

/* ===== Footer ===== */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  max-width: 1080px; margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; gap: 8px;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.8rem; font-weight: 500;
  color: var(--text-dim);
}
.footer-sep { color: var(--text-muted); }
.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero { padding: 72px 0 56px; }
  .how, .features, .install { padding: 72px 0; }
  .install-card { padding: 40px 24px; }
  .demo-addr { flex-direction: column; gap: 4px; }
  .demo-site { min-width: unset; }
  .nav-links a:not(.nav-cta) { display: none; }
}