/**
 * GasApp checkout — design tokens + page styles.
 *
 * Aesthetic direction: refined trust. People are entering credit card info.
 * Single-column mobile-first, generous spacing, confident green accents,
 * crisp typography. Inspired by Stripe's checkout but with our brand voice.
 *
 * Built mobile-first. Desktop adds horizontal breathing room and a slightly
 * wider container, but the structure stays single-column for focus.
 */

/* ============================================================
   GLOBAL RESET (scoped to the checkout page body class)
   ============================================================ */

body.gasapp-checkout-page,
body.gasapp-checkout-page *,
body.gasapp-checkout-page *::before,
body.gasapp-checkout-page *::after {
  box-sizing: border-box;
}

body.gasapp-checkout-page {
  overflow-x: hidden;          /* belt-and-suspenders against runaway widths */
  -webkit-text-size-adjust: 100%;
}

/* iOS Safari: prevent images and embeds from blowing out width */
body.gasapp-checkout-page img,
body.gasapp-checkout-page iframe,
body.gasapp-checkout-page svg {
  max-width: 100%;
}

:root {
  /* ---- Brand ---- */
  --gasapp-green:       #16A34A;  /* primary brand */
  --gasapp-green-dark:  #15803D;  /* hover/pressed */
  --gasapp-green-light: #DCFCE7;  /* tinted backgrounds, success states */
  --gasapp-green-accent: #22C55E; /* highlights, badges */

  /* ---- Neutrals ---- */
  --gasapp-ink:        #0F172A;   /* primary text */
  --gasapp-ink-soft:   #334155;   /* secondary text */
  --gasapp-ink-muted:  #64748B;   /* tertiary text, helper */
  --gasapp-line:       #E2E8F0;   /* borders */
  --gasapp-line-soft:  #F1F5F9;   /* subtle dividers */
  --gasapp-canvas:     #FAFAFA;   /* page background */
  --gasapp-paper:      #FFFFFF;   /* card backgrounds */

  /* ---- States ---- */
  --gasapp-error:      #DC2626;
  --gasapp-error-bg:   #FEE2E2;
  --gasapp-warning:    #D97706;
  --gasapp-warning-bg: #FEF3C7;

  /* ---- Type ---- */
  --gasapp-font-display: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --gasapp-font-body:    'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --gasapp-font-mono:    ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* ---- Spacing scale (4px base) ---- */
  --gasapp-space-1: 4px;
  --gasapp-space-2: 8px;
  --gasapp-space-3: 12px;
  --gasapp-space-4: 16px;
  --gasapp-space-5: 24px;
  --gasapp-space-6: 32px;
  --gasapp-space-7: 48px;
  --gasapp-space-8: 64px;

  /* ---- Radius ---- */
  --gasapp-radius-sm: 6px;
  --gasapp-radius:    10px;
  --gasapp-radius-md: 12px;
  --gasapp-radius-lg: 16px;
  --gasapp-radius-xl: 24px;

  /* ---- Shadows ---- */
  --gasapp-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --gasapp-shadow:    0 4px 12px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --gasapp-shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04);

  /* ---- Motion ---- */
  --gasapp-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================================
   PAGE SHELL
   ============================================================ */

body.gasapp-checkout-page {
  margin: 0;
  background: var(--gasapp-canvas);
  font-family: var(--gasapp-font-body);
  color: var(--gasapp-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.gasapp-checkout {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.gasapp-checkout-header {
  padding: var(--gasapp-space-5) var(--gasapp-space-4);
  background: var(--gasapp-paper);
  border-bottom: 1px solid var(--gasapp-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gasapp-checkout-logo {
  font-family: var(--gasapp-font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gasapp-ink);
  text-decoration: none;
}

.gasapp-checkout-logo span {
  color: var(--gasapp-green);
}

.gasapp-checkout-secure {
  display: inline-flex;
  align-items: center;
  gap: var(--gasapp-space-2);
  font-size: 13px;
  color: var(--gasapp-ink-muted);
}

.gasapp-checkout-secure svg {
  width: 14px;
  height: 14px;
}

.gasapp-checkout-main {
  flex: 1;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  padding: var(--gasapp-space-5) var(--gasapp-space-4) var(--gasapp-space-7);
}

/* On very narrow screens (small Android, older iPhones) reduce horizontal
   padding to keep form content readable. The form sections have their
   own padding inside. */
@media (max-width: 360px) {
  .gasapp-checkout-main {
    padding-left: var(--gasapp-space-3);
    padding-right: var(--gasapp-space-3);
  }
}

@media (min-width: 768px) {
  .gasapp-checkout-main {
    padding-top: var(--gasapp-space-7);
  }
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

.gasapp-checkout h1 {
  font-family: var(--gasapp-font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin: 0 0 var(--gasapp-space-2);
  color: var(--gasapp-ink);
}

.gasapp-checkout h2 {
  font-family: var(--gasapp-font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--gasapp-space-4);
  color: var(--gasapp-ink);
}

.gasapp-checkout p {
  margin: 0 0 var(--gasapp-space-4);
  line-height: 1.55;
  color: var(--gasapp-ink-soft);
}

.gasapp-subtitle {
  color: var(--gasapp-ink-muted);
  font-size: 15px;
  margin-bottom: var(--gasapp-space-6);
}

/* ============================================================
   PLAN PICKER (when no ?plan= specified)
   ============================================================ */

.gasapp-plan-list {
  display: flex;
  flex-direction: column;
  gap: var(--gasapp-space-3);
  margin-bottom: var(--gasapp-space-5);
}

.gasapp-plan-card {
  position: relative;
  background: var(--gasapp-paper);
  border: 2px solid var(--gasapp-line);
  border-radius: var(--gasapp-radius-lg);
  padding: var(--gasapp-space-5);
  cursor: pointer;
  transition: border-color 0.15s var(--gasapp-ease), box-shadow 0.15s var(--gasapp-ease), transform 0.15s var(--gasapp-ease);
}

.gasapp-plan-card:hover {
  border-color: var(--gasapp-green-accent);
  box-shadow: var(--gasapp-shadow);
}

.gasapp-plan-card.is-selected {
  border-color: var(--gasapp-green);
  box-shadow: 0 0 0 4px var(--gasapp-green-light), var(--gasapp-shadow);
}

.gasapp-plan-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--gasapp-space-3);
  margin-bottom: var(--gasapp-space-3);
}

.gasapp-plan-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gasapp-ink);
}

.gasapp-plan-card-price {
  font-family: var(--gasapp-font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--gasapp-ink);
  white-space: nowrap;
}

.gasapp-plan-card-price small {
  font-size: 13px;
  font-weight: 500;
  color: var(--gasapp-ink-muted);
}

.gasapp-plan-card-desc {
  font-size: 14px;
  color: var(--gasapp-ink-muted);
  line-height: 1.5;
  margin: 0;
}

/* ============================================================
   ORDER SUMMARY (when plan selected)
   ============================================================ */

.gasapp-summary {
  background: var(--gasapp-paper);
  border: 1px solid var(--gasapp-line);
  border-radius: var(--gasapp-radius-lg);
  padding: var(--gasapp-space-5);
  margin-bottom: var(--gasapp-space-5);
}

.gasapp-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--gasapp-space-3);
  padding: var(--gasapp-space-3) 0;
}

.gasapp-summary-row + .gasapp-summary-row {
  border-top: 1px solid var(--gasapp-line-soft);
}

.gasapp-summary-row.is-total {
  border-top: 1px solid var(--gasapp-line);
  padding-top: var(--gasapp-space-4);
  margin-top: var(--gasapp-space-2);
}

.gasapp-summary-label {
  font-size: 14px;
  color: var(--gasapp-ink-soft);
}

.gasapp-summary-row.is-total .gasapp-summary-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--gasapp-ink);
}

.gasapp-summary-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--gasapp-ink);
}

.gasapp-summary-row.is-total .gasapp-summary-value {
  font-size: 22px;
  font-family: var(--gasapp-font-display);
  font-weight: 700;
}

.gasapp-summary-value small {
  font-size: 12px;
  font-weight: 500;
  color: var(--gasapp-ink-muted);
}

.gasapp-summary-change-link {
  font-size: 13px;
  color: var(--gasapp-green-dark);
  text-decoration: none;
  font-weight: 500;
}

.gasapp-summary-change-link:hover {
  text-decoration: underline;
}

/* ============================================================
   FORM FIELDS
   ============================================================ */

.gasapp-form-section {
  background: var(--gasapp-paper);
  border: 1px solid var(--gasapp-line);
  border-radius: var(--gasapp-radius-lg);
  padding: var(--gasapp-space-5);
  margin-bottom: var(--gasapp-space-4);
}

.gasapp-field {
  margin-bottom: var(--gasapp-space-4);
}

.gasapp-field:last-child {
  margin-bottom: 0;
}

.gasapp-field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gasapp-ink-soft);
  margin-bottom: var(--gasapp-space-2);
}

.gasapp-input,
.gasapp-stripe-element {
  width: 100%;
  background: var(--gasapp-paper);
  border: 1px solid var(--gasapp-line);
  border-radius: var(--gasapp-radius-sm);
  padding: 12px 14px;
  font-family: var(--gasapp-font-body);
  font-size: 16px; /* 16px to prevent iOS zoom on focus */
  color: var(--gasapp-ink);
  transition: border-color 0.15s var(--gasapp-ease), box-shadow 0.15s var(--gasapp-ease);
  box-sizing: border-box;
}

.gasapp-input:focus {
  outline: none;
  border-color: var(--gasapp-green);
  box-shadow: 0 0 0 3px var(--gasapp-green-light);
}

.gasapp-input::placeholder {
  color: var(--gasapp-ink-muted);
}

.gasapp-stripe-element {
  padding: 14px;
  min-height: 48px;
}

.gasapp-stripe-element--focused {
  border-color: var(--gasapp-green);
  box-shadow: 0 0 0 3px var(--gasapp-green-light);
}

.gasapp-stripe-element--invalid {
  border-color: var(--gasapp-error);
}

.gasapp-field-error {
  font-size: 13px;
  /* 17.50.23: hardcoded fallback color so the error remains visible even
     if the CSS custom property doesn't resolve. Same defensive pattern
     as 17.50.17's login fix. */
  color: #DC2626;
  color: var(--gasapp-error, #DC2626);
  margin-top: var(--gasapp-space-2, 8px);
  font-weight: 500;
}

.gasapp-field-help {
  font-size: 12px;
  color: var(--gasapp-ink-muted);
  margin-top: var(--gasapp-space-2);
}

/* Two-column for name + email on wider screens */
.gasapp-field-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gasapp-space-3);
}

@media (min-width: 480px) {
  .gasapp-field-row.is-two-col {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================================
   AUTH STATE BANNER
   ============================================================ */

.gasapp-auth-banner {
  background: var(--gasapp-green-light);
  border: 1px solid var(--gasapp-green-accent);
  border-radius: var(--gasapp-radius);
  padding: var(--gasapp-space-3) var(--gasapp-space-4);
  font-size: 14px;
  color: var(--gasapp-ink);
  margin-bottom: var(--gasapp-space-4);
  display: flex;
  align-items: center;
  gap: var(--gasapp-space-3);
}

.gasapp-auth-banner svg {
  width: 18px;
  height: 18px;
  color: var(--gasapp-green-dark);
  flex-shrink: 0;
}

.gasapp-auth-toggle {
  background: none;
  border: none;
  color: var(--gasapp-green-dark);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

/* ============================================================
   BUTTON
   ============================================================ */

.gasapp-btn {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gasapp-space-2);
  background: var(--gasapp-green);
  color: white;
  font-family: var(--gasapp-font-display);
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--gasapp-radius);
  padding: 16px 24px;
  cursor: pointer;
  transition: background-color 0.15s var(--gasapp-ease), transform 0.1s var(--gasapp-ease);
  -webkit-tap-highlight-color: transparent;
}

.gasapp-btn:hover:not(:disabled) {
  background: var(--gasapp-green-dark);
}

.gasapp-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.gasapp-btn:disabled {
  background: var(--gasapp-ink-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.gasapp-btn--secondary {
  background: var(--gasapp-paper);
  color: var(--gasapp-ink);
  border: 1px solid var(--gasapp-line);
}

.gasapp-btn--secondary:hover:not(:disabled) {
  background: var(--gasapp-line-soft);
}

.gasapp-btn-loader {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: gasapp-spin 0.7s linear infinite;
}

@keyframes gasapp-spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   ERROR / SUCCESS BLOCKS
   ============================================================ */

.gasapp-alert {
  border-radius: var(--gasapp-radius);
  padding: var(--gasapp-space-3) var(--gasapp-space-4);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: var(--gasapp-space-4);
  display: flex;
  align-items: flex-start;
  gap: var(--gasapp-space-3);
}

.gasapp-alert--error {
  /* 17.50.23: hardcoded fallback so the banner stays visible without
     CSS var support. */
  background: #FEE2E2;
  background: var(--gasapp-error-bg, #FEE2E2);
  color: #991B1B;
  color: var(--gasapp-error, #991B1B);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.gasapp-alert--info {
  background: var(--gasapp-green-light);
  color: var(--gasapp-ink);
  border: 1px solid var(--gasapp-green-accent);
}

.gasapp-alert svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================================
   FOOTER
   ============================================================ */

.gasapp-checkout-footer {
  text-align: center;
  font-size: 12px;
  color: var(--gasapp-ink-muted);
  padding: var(--gasapp-space-5) var(--gasapp-space-4);
}

.gasapp-checkout-footer a {
  color: var(--gasapp-ink-muted);
  text-decoration: none;
}

.gasapp-checkout-footer a:hover {
  color: var(--gasapp-ink);
  text-decoration: underline;
}

/* ============================================================
   LOADING STATES
   ============================================================ */

.gasapp-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--gasapp-space-8) var(--gasapp-space-4);
  text-align: center;
}

.gasapp-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gasapp-line);
  border-top-color: var(--gasapp-green);
  border-radius: 50%;
  animation: gasapp-spin 0.8s linear infinite;
  margin-bottom: var(--gasapp-space-4);
}

/* ============================================================
   SUCCESS SCREEN
   ============================================================ */

.gasapp-success {
  text-align: center;
  padding: var(--gasapp-space-7) var(--gasapp-space-4);
}

.gasapp-success-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gasapp-green-light);
  color: var(--gasapp-green-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--gasapp-space-5);
}

.gasapp-success-icon svg {
  width: 36px;
  height: 36px;
}

.gasapp-success h1 {
  margin-bottom: var(--gasapp-space-3);
}


/* ============================================================
   17.50.9: ACCOUNT-EXISTS ALERT VARIANT + SIGN-IN MODAL
   For the case when subscribe form rejects with email_taken —
   we surface a Sign in button right next to the error so the
   user has a path forward without leaving the page.
   ============================================================ */

.gasapp-alert--with-action {
  align-items: flex-start;
}
.gasapp-alert-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.gasapp-alert-msg {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
}
.gasapp-alert-action {
  align-self: flex-start;
  background: var(--gasapp-green);
  color: #fff;
  border: 0;
  padding: 8px 16px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.12s;
}
.gasapp-alert-action:hover {
  background: var(--gasapp-green-dark, #15803D);
}

/* Sign-in modal — anchored center, scrim on background. Uses the same
   tokens as the rest of the subscribe page so it inherits any theme
   tweaks. iOS-safe: 16px input font-size prevents zoom on focus. */
.gasapp-signin-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  animation: gasappSigninFadeIn 0.15s ease-out;
}
@keyframes gasappSigninFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.gasapp-signin-modal {
  position: relative;
  background: #fff;
  border-radius: var(--gasapp-radius-lg, 16px);
  max-width: 400px;
  width: 100%;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.25);
}
.gasapp-signin-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: transparent;
  border: 0;
  color: var(--gasapp-ink-muted);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  /* 17.50.21: 44×44 tap target. Was ~36×36 (24 glyph + 6/10 pad). */
  padding: 10px 14px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 6px;
  font-family: inherit;
}
.gasapp-signin-close:hover { background: var(--gasapp-line-soft, #f3f4f6); }
.gasapp-signin-title {
  margin: 0 0 6px;
  font-family: var(--gasapp-font-display, inherit);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gasapp-ink);
}
.gasapp-signin-sub {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--gasapp-ink-muted);
  line-height: 1.5;
}
.gasapp-signin-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.gasapp-signin-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.gasapp-signin-field-lbl {
  font-size: 13px;
  font-weight: 500;
  color: var(--gasapp-ink);
}
.gasapp-signin-field input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gasapp-line);
  border-radius: 8px;
  font-size: 16px; /* iOS zoom prevention */
  font-family: inherit;
  color: var(--gasapp-ink);
  background: #fff;
  transition: border-color 0.12s, box-shadow 0.12s;
}
.gasapp-signin-field input:focus {
  outline: none;
  border-color: var(--gasapp-green);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.12);
}
.gasapp-signin-error {
  padding: 10px 12px;
  background: var(--gasapp-error-bg, #FEE2E2);
  color: var(--gasapp-error, #991B1B);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.4;
}
.gasapp-signin-submit {
  background: var(--gasapp-green);
  color: #fff;
  border: 0;
  padding: 14px 24px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
  transition: background 0.12s;
}
.gasapp-signin-submit:hover:not(:disabled) {
  background: var(--gasapp-green-dark, #15803D);
}
.gasapp-signin-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.gasapp-signin-forgot {
  margin: 8px 0 0;
  text-align: center;
  font-size: 13px;
}
.gasapp-signin-forgot a {
  color: var(--gasapp-green-dark, #15803D);
  text-decoration: none;
}
.gasapp-signin-forgot a:hover {
  text-decoration: underline;
}

/* 17.50.21: password-field eye toggle. Copied from driver.css so the
   checkout page (which loads checkout.css only) gets the same UX. */
.gasapp-pwd-wrap {
  position: relative;
}
.gasapp-pwd-wrap input[type="password"],
.gasapp-pwd-wrap input[type="text"] {
  padding-right: 44px !important;
}
.gasapp-pwd-toggle {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  color: var(--gasapp-ink-muted);
  transition: color 0.15s, background 0.15s;
}
.gasapp-pwd-toggle:hover {
  color: var(--gasapp-ink);
  background: rgba(15, 23, 42, 0.04);
}
.gasapp-pwd-toggle:focus-visible {
  outline: 2px solid var(--gasapp-green);
  outline-offset: 2px;
}