@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@600;700&display=swap");

:root,
[data-theme="dark"] {
  --bg: #09090b;
  --surface: #18181b;
  --surface-elevated: #1f1f23;
  --input-bg: rgba(9, 9, 11, 0.55);
  --text: #fafafa;
  --muted: #71717a;
  --text-secondary: #a1a1aa;
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --accent-soft: rgba(6, 182, 212, 0.14);
  --accent-glow: rgba(6, 182, 212, 0.3);
  --indigo: #14b8a6;
  --btn-primary-text: #ffffff;
  --btn-primary-bg: var(--accent);
  --btn-primary-bg-hover: var(--accent-hover);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --border-hover: rgba(255, 255, 255, 0.2);
  --hover-bg: rgba(255, 255, 255, 0.04);
  --link: #67e8f9;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-full: 999px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-normal: 220ms;
  --duration-slow: 480ms;
  --font-display: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font: var(--font-body);
  --error-bg: rgba(239, 68, 68, 0.12);
  --error-border: rgba(239, 68, 68, 0.35);
  --error-text: #fca5a5;
  --success-bg: rgba(34, 197, 94, 0.12);
  --success-border: rgba(34, 197, 94, 0.35);
  --success-text: #86efac;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --warning-border: rgba(245, 158, 11, 0.35);
  --warning-text: #fcd34d;
}

[data-theme="light"] {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-elevated: #f4f4f5;
  --input-bg: #ffffff;
  --text: #09090b;
  --muted: #71717a;
  --text-secondary: #52525b;
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --accent-soft: rgba(6, 182, 212, 0.12);
  --accent-glow: rgba(6, 182, 212, 0.22);
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.12);
  --border-hover: rgba(0, 0, 0, 0.18);
  --hover-bg: rgba(0, 0, 0, 0.04);
  --link: #0e7490;
  --error-bg: rgba(239, 68, 68, 0.1);
  --error-border: rgba(239, 68, 68, 0.3);
  --error-text: #b91c1c;
  --success-bg: rgba(34, 197, 94, 0.1);
  --success-border: rgba(34, 197, 94, 0.3);
  --success-text: #15803d;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --warning-border: rgba(245, 158, 11, 0.3);
  --warning-text: #b45309;
}

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

body {
  font-family: var(--font);
  background:
    radial-gradient(ellipse 90% 60% at 50% -30%, rgba(6, 182, 212, 0.14), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

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

a:hover {
  text-decoration: underline;
}

/* Header */
.subscribe-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    background var(--duration-normal) var(--ease-out);
}

.subscribe-header.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
}

[data-theme="light"] .subscribe-header.is-scrolled {
  background: rgba(255, 255, 255, 0.9);
}

.subscribe-brand {
  display: flex;
  align-items: center;
  color: var(--text);
  text-decoration: none;
}

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

.subscribe-brand.site-logo img {
  height: 32px;
}

.subscribe-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.subscribe-nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--duration-normal) ease;
}

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

/* Shell */
.subscribe-shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.subscribe-shell-success {
  max-width: 520px;
}

/* Step progress */
.subscribe-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  list-style: none;
  margin-bottom: 2.5rem;
  padding: 0;
}

.subscribe-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 500;
  position: relative;
  padding: 0 1.25rem;
}

.subscribe-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -1rem;
  top: 50%;
  width: 2rem;
  height: 1px;
  background: var(--border-strong);
  transform: translateY(-50%);
}

.subscribe-step-num {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 600;
  transition:
    background var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    color var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.subscribe-step.is-active .subscribe-step-num {
  background: var(--accent-soft);
  border-color: rgba(6, 182, 212, 0.4);
  color: var(--accent);
}

.subscribe-step.is-complete .subscribe-step-num {
  background: linear-gradient(135deg, var(--accent), var(--indigo));
  border-color: transparent;
  color: #fff;
}

.subscribe-step.is-active {
  color: var(--text);
}

.subscribe-step.is-complete {
  color: var(--text-secondary);
}

.subscribe-step-label {
  display: none;
}

@media (min-width: 540px) {
  .subscribe-step-label {
    display: inline;
  }
}

/* Intro */
.subscribe-intro {
  text-align: center;
  margin-bottom: 2rem;
}

.subscribe-intro h1 {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
  font-weight: 700;
}

.subscribe-intro p {
  color: var(--text-secondary);
  max-width: 28rem;
  margin: 0 auto;
  font-size: 0.95rem;
}

.success-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  border-radius: var(--radius-full);
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
  display: grid;
  place-items: center;
  animation: success-pop var(--duration-slow) var(--ease-out) both;
}

.success-icon svg {
  width: 1.35rem;
  height: 1.35rem;
}

@keyframes success-pop {
  from {
    opacity: 0;
    transform: scale(0.6);
  }
  60% {
    transform: scale(1.08);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Grid */
.subscribe-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 720px) {
  .subscribe-grid {
    grid-template-columns: 1fr;
  }

  .subscribe-step:not(:last-child)::after {
    width: 1.25rem;
    right: -0.65rem;
  }

  .subscribe-step {
    padding: 0 0.75rem;
  }
}

.subscribe-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.subscribe-panel h2 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.subscribe-panel-success,
.subscribe-panel-checkout {
  max-width: none;
}

/* Billing toggle */
.billing-toggle {
  position: relative;
  display: inline-flex;
  padding: 0.2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--input-bg);
  margin-bottom: 1.25rem;
}

.billing-indicator {
  position: absolute;
  top: 0;
  left: 0;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent), var(--indigo));
  box-shadow: 0 2px 10px var(--accent-glow);
  pointer-events: none;
  z-index: 0;
  transition:
    transform 0.35s var(--ease-out),
    width 0.35s var(--ease-out),
    height 0.35s var(--ease-out);
}

.billing-option {
  position: relative;
  z-index: 1;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: color var(--duration-normal) ease;
}

.billing-option.is-active {
  background: transparent;
  color: #fff;
}

.billing-option:hover:not(.is-active) {
  color: var(--text);
}

/* Plan picker */
.plan-picker {
  display: grid;
  gap: 0.5rem;
}

.plan-option {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    background var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.plan-option:hover {
  border-color: var(--border-hover);
  background: var(--hover-bg);
}

.plan-option.is-selected {
  border-color: rgba(6, 182, 212, 0.45);
  background: var(--accent-soft);
  transform: translateX(2px);
}

.plan-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.plan-option-body {
  flex: 1;
}

.plan-option-title {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.plan-price {
  transition: opacity var(--duration-normal) ease;
}

.plan-option-desc {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 0.15rem;
}

/* Summary */
.summary-price {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  margin-bottom: 1.25rem;
}

.summary-price .amount {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: opacity var(--duration-normal) ease, transform var(--duration-normal) var(--ease-out);
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.feature-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 1.15rem;
  position: relative;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.75rem;
}

/* Form */
.checkout-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--text-secondary);
}

.checkout-form input[type="email"] {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  margin-bottom: 1rem;
  transition:
    border-color var(--duration-normal) ease,
    box-shadow var(--duration-normal) ease;
}

.checkout-form input[type="email"]:focus {
  outline: none;
  border-color: rgba(6, 182, 212, 0.5);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.payment-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

/* Buttons */
a.btn-primary,
button.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.8rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--btn-primary-bg), var(--indigo));
  color: var(--btn-primary-text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out),
    filter var(--duration-normal) ease;
}

a.btn-primary:hover,
button.btn-primary:hover {
  color: var(--btn-primary-text);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
  filter: brightness(1.05);
}

a.btn-primary:active,
button.btn-primary:active {
  transform: scale(0.98);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  transition:
    border-color var(--duration-normal) ease,
    background var(--duration-normal) ease;
}

.btn-outline:hover {
  border-color: var(--border-hover);
  background: var(--hover-bg);
  text-decoration: none;
}

/* Alerts */
.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.88rem;
  line-height: 1.45;
}

.alert-error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error-text);
}

.alert-warning {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
}

.alert-success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
}

.dev-banner {
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  font-size: 0.85rem;
}

.credentials-box {
  margin: 1rem 0;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-elevated);
  border: 1px solid var(--border-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88rem;
}

.credentials-box p {
  margin-bottom: 0.35rem;
}

.success-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.success-actions .btn-primary {
  width: auto;
  min-width: 10rem;
}

/* Page enter */
@media (prefers-reduced-motion: no-preference) {
  [data-page-enter] {
    opacity: 0;
    transform: translateY(10px);
    transition:
      opacity var(--duration-slow) var(--ease-out) var(--enter-delay, 0ms),
      transform var(--duration-slow) var(--ease-out) var(--enter-delay, 0ms);
  }

  [data-page-enter].is-entered {
    opacity: 1;
    transform: translateY(0);
  }

  [data-stagger] > * {
    opacity: 0;
    transform: translateY(6px);
    transition:
      opacity 0.4s var(--ease-out),
      transform 0.4s var(--ease-out);
    transition-delay: calc(var(--stagger-index, 0) * 50ms + 120ms);
  }

  .motion-ready [data-page-enter].is-entered [data-stagger] > *,
  [data-page-enter].is-entered [data-stagger] > * {
    opacity: 1;
    transform: translateY(0);
  }
}

.subscribe-footer {
  margin: 2rem 1.5rem 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
}

.subscribe-footer a {
  color: var(--link);
  text-decoration: none;
  font-weight: 500;
}

.subscribe-footer a:hover {
  text-decoration: underline;
}

.subscribe-legal {
  margin-top: 0.75rem;
  font-size: 0.8rem;
}

.subscribe-legal a {
  font-weight: 400;
}

@media (prefers-reduced-motion: reduce) {
  [data-page-enter],
  [data-stagger] > *,
  .success-icon {
    opacity: 1;
    transform: none;
    transition: none;
    animation: none;
  }

  .billing-indicator {
    transition: none;
  }

  a.btn-primary:hover,
  button.btn-primary:hover {
    transform: none;
  }
}