/* ============================
   SimonHOS – Main Stylesheet
   Dark offshore hosting theme
   ============================ */

:root {
  --bg-base:    #080c14;
  --bg-card:    #0e1420;
  --bg-card2:   #131b2b;
  --border:     #1e2d45;
  --primary:    #00e5ff;
  --primary-d:  #00b8cc;
  --green:      #00ff88;
  --green-d:    #00cc6a;
  --text:       #c9d6e8;
  --text-dim:   #6b7a96;
  --text-muted: #3d4f6a;
  --danger:     #ff3b5c;
  --warn:       #ffb347;
  --radius:     6px;
  --radius-lg:  12px;
  --glow:       0 0 20px rgba(0,229,255,0.15);
  --glow-green: 0 0 20px rgba(0,255,136,0.15);
  --transition: 0.2s ease;
}

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

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

body {
  background: var(--bg-base);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-d); }
img { max-width: 100%; display: block; }

/* ── Typography ── */
h1, h2, h3, h4 {
  color: #e8f0fe;
  font-weight: 700;
  line-height: 1.25;
}
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.2rem); }
h3 { font-size: 1.2rem; }

.text-primary { color: var(--primary); }
.text-green   { color: var(--green); }
.text-dim     { color: var(--text-dim); }
.text-danger  { color: var(--danger); }
.text-center  { text-align: center; }

/* ── Layout ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 12, 20, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}
.logo span { color: var(--primary); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-dim);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text);
  background: var(--bg-card2);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

@media (max-width: 720px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.5rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; width: 100%; padding: 0.6rem 1rem; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  line-height: 1.4;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #000;
}
.btn-primary:hover {
  background: var(--primary-d);
  color: #000;
  box-shadow: var(--glow);
  transform: translateY(-1px);
}

.btn-green {
  background: var(--green);
  color: #000;
}
.btn-green:hover {
  background: var(--green-d);
  color: #000;
  box-shadow: var(--glow-green);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #000;
}

.btn-ghost {
  background: var(--bg-card2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-card); border-color: var(--primary); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #cc2e4a; }

.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.8rem; }
.btn-lg { padding: 0.8rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.card-hover {
  transition: all var(--transition);
}
.card-hover:hover {
  border-color: var(--primary);
  box-shadow: var(--glow);
  transform: translateY(-2px);
}

/* ── Hero ── */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* hero canvas */
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* floating orbs */
.hero-orbs { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  animation: orbFloat 12s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,229,255,0.18), transparent 70%);
  top: -100px; left: -100px;
  animation-delay: 0s; animation-duration: 14s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,255,136,0.12), transparent 70%);
  bottom: -80px; right: 10%;
  animation-delay: -5s; animation-duration: 18s;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0,229,255,0.10), transparent 70%);
  top: 30%; right: -60px;
  animation-delay: -9s; animation-duration: 22s;
}

@keyframes orbFloat {
  0%   { opacity: 0;    transform: translate(0px, 0px) scale(1); }
  10%  { opacity: 1; }
  50%  { transform: translate(30px, -40px) scale(1.1); }
  90%  { opacity: 1; }
  100% { opacity: 0;    transform: translate(0px, 0px) scale(1); }
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0,229,255,0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0,255,136,0.04) 0%, transparent 60%);
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  z-index: 1;
}

.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0,229,255,0.1);
  border: 1px solid rgba(0,229,255,0.3);
  color: var(--primary);
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 { margin-bottom: 1.25rem; }
.hero h1 em { font-style: normal; color: var(--primary); }
.hero p { color: var(--text-dim); font-size: 1.1rem; max-width: 560px; margin-bottom: 2rem; }

.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}
.hero-stat strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
}
.hero-stat span { color: var(--text-dim); font-size: 0.85rem; }

/* ── Section headers ── */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header p { color: var(--text-dim); margin-top: 0.75rem; max-width: 560px; margin-left: auto; margin-right: auto; }

.label-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

/* ── Product cards ── */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}
.product-card:hover {
  border-color: var(--primary);
  box-shadow: var(--glow);
  transform: translateY(-3px);
}
.product-card.featured {
  border-color: var(--primary);
}
.featured-badge {
  position: absolute;
  top: -1px; right: 1.5rem;
  background: var(--primary);
  color: #000;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 0 0 var(--radius) var(--radius);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-type {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  width: fit-content;
}
.type-domain { background: rgba(0,229,255,0.1); color: var(--primary); }
.type-vps    { background: rgba(0,255,136,0.1); color: var(--green); }
.type-rdp    { background: rgba(255,179,71,0.1); color: var(--warn); }

.product-price {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
}
.product-price span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-dim);
}

.product-specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.product-specs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}
.product-specs li::before {
  content: '✓';
  color: var(--green);
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* ── Features ── */
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}
.feature-card:hover { border-color: var(--border); }

.feature-icon {
  width: 48px; height: 48px;
  background: rgba(0,229,255,0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.feature-card h3 { margin-bottom: 0.5rem; font-size: 1rem; }
.feature-card p  { color: var(--text-dim); font-size: 0.88rem; }

/* ── How it works ── */
.steps { display: flex; gap: 0; position: relative; }
.steps::before {
  content: '';
  position: absolute;
  top: 24px; left: calc(50% / 3);
  right: calc(50% / 3);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.step {
  flex: 1;
  text-align: center;
  padding: 0 1rem;
}
.step-num {
  width: 48px; height: 48px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}
.step h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.step p   { color: var(--text-dim); font-size: 0.85rem; }

@media (max-width: 600px) {
  .steps { flex-direction: column; gap: 2rem; }
  .steps::before { display: none; }
}

/* ── Forms ── */
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.form-control {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
  font-family: inherit;
}
.form-control:focus  { border-color: var(--primary); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control  { appearance: none; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 100px; }

.form-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.3rem; }

/* ── Checkout steps ── */
.checkout-steps {
  display: flex;
  gap: 0;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.checkout-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.checkout-step.active { color: var(--primary); border-bottom-color: var(--primary); }
.checkout-step.done   { color: var(--green); }
.checkout-step .step-n {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg-card2);
  border: 1px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
}

/* ── Payment box ── */
.payment-box {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.btc-address-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
}
.btc-address-box code {
  flex: 1;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
  color: var(--primary);
  word-break: break-all;
}
.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: var(--radius);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: all var(--transition);
}
.copy-btn:hover { border-color: var(--primary); color: var(--primary); }
.copy-btn.copied { border-color: var(--green); color: var(--green); }

.countdown {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--warn);
}
.countdown-time { font-weight: 700; font-variant-numeric: tabular-nums; }

/* ── Order status badge ── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.status-pending_payment { background: rgba(255,179,71,0.12); color: var(--warn); }
.status-payment_received { background: rgba(0,255,136,0.1); color: var(--green); }
.status-processing       { background: rgba(0,229,255,0.1); color: var(--primary); }
.status-active           { background: rgba(0,255,136,0.15); color: var(--green); border: 1px solid rgba(0,255,136,0.3); }
.status-suspended        { background: rgba(255,59,92,0.1); color: var(--danger); }
.status-cancelled        { background: rgba(107,122,150,0.1); color: var(--text-dim); }
.status-expired          { background: rgba(107,122,150,0.1); color: var(--text-muted); }

/* ── Product filter tabs ── */
.filter-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-tab {
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-tab:hover { border-color: var(--primary); color: var(--primary); }
.filter-tab.active { background: var(--primary); border-color: var(--primary); color: #000; }

/* ── Alert / Notice ── */
.alert {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  border: 1px solid;
}
.alert-info    { background: rgba(0,229,255,0.05); border-color: rgba(0,229,255,0.25); color: var(--primary); }
.alert-success { background: rgba(0,255,136,0.05); border-color: rgba(0,255,136,0.25); color: var(--green); }
.alert-danger  { background: rgba(255,59,92,0.05); border-color: rgba(255,59,92,0.25); color: var(--danger); }
.alert-warn    { background: rgba(255,179,71,0.05); border-color: rgba(255,179,71,0.25); color: var(--warn); }

/* ── Order summary sidebar ── */
.order-summary {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: sticky;
  top: 80px;
}
.order-summary h3 { font-size: 1rem; margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); }
.summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
.summary-row.total {
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  margin-top: 0.5rem;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
}
.summary-row span:last-child { color: var(--text); }
.summary-btc {
  background: rgba(0,229,255,0.05);
  border: 1px solid rgba(0,229,255,0.2);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-top: 1rem;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--primary);
}
.summary-btc strong { display: block; font-size: 1.2rem; }

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 1rem 0;
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text-muted); }

/* ── Loading spinner ── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem;
  color: var(--text-dim);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand p { color: var(--text-dim); font-size: 0.85rem; margin-top: 0.75rem; line-height: 1.7; }
.footer-col h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 0.75rem; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.4rem; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.85rem; transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 0.5rem;
}
.bitcoin-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--warn);
  font-weight: 600;
}

/* ── Utility ── */
.d-flex   { display: flex; }
.gap-1    { gap: 0.5rem; }
.gap-2    { gap: 1rem; }
.mt-1     { margin-top: 0.5rem; }
.mt-2     { margin-top: 1rem; }
.mt-3     { margin-top: 1.5rem; }
.mb-1     { margin-bottom: 0.5rem; }
.mb-2     { margin-bottom: 1rem; }
.mb-3     { margin-bottom: 1.5rem; }
.hidden   { display: none !important; }
.w-100    { width: 100%; }

/* ── Product detail page ── */
.product-detail {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 768px) {
  .product-detail { grid-template-columns: 1fr; }
}

.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr { border-bottom: 1px solid var(--border); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td { padding: 0.65rem 0; font-size: 0.9rem; }
.spec-table td:first-child { color: var(--text-dim); width: 40%; }
.spec-table td:last-child { color: var(--text); font-weight: 500; }

/* ── Tabs (product page) ── */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}
.tab-btn {
  padding: 0.6rem 1.2rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
  transition: all var(--transition);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Checkout layout ── */
.checkout-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 900px) {
  .checkout-layout { grid-template-columns: 1fr; }
  .order-summary { position: static; }
}

/* ── Scroll animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible { opacity: 1; transform: none; }