/* Design tokens */

:root {
  color-scheme: light dark;

  --color-background: #ffffff;
  --color-surface: #f4f4f5;
  --color-card: #ffffff;
  --color-border: #e4e4e7;
  --color-border-strong: #71717a;
  --color-text: #18181b;
  --color-text-muted: #52525b;
  --color-accent: #2e7d32;
  --color-accent-hover: #1b5e20;
  --color-on-accent: #ffffff;
  --color-link: #2e7d32;
  --color-focus-ring: #2e7d32;
  --color-segment-tint: #c8e6c9;
  --color-on-segment-tint: #1b5e20;
  --shadow-card: 0 1px 2px rgb(24 24 27 / 0.05), 0 4px 16px rgb(24 24 27 / 0.06);

  --font-family-base: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-monospace: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;
  --font-size-small: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lead: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  --font-size-heading-3: 1.125rem;
  --font-size-heading-2: clamp(1.625rem, 1.3rem + 1.4vw, 2.25rem);
  --font-size-heading-1: clamp(2.25rem, 1.5rem + 3.4vw, 3.75rem);
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  --line-height-base: 1.6;
  --line-height-heading: 1.15;

  --space-extra-small: 0.25rem;
  --space-small: 0.5rem;
  --space-medium: 1rem;
  --space-large: 1.5rem;
  --space-extra-large: 2.5rem;
  --space-section: clamp(3.5rem, 2.5rem + 4vw, 6rem);
  --page-gutter: clamp(1rem, 0.5rem + 2.5vw, 2rem);

  --radius-small: 0.375rem;
  --radius-medium: 0.625rem;
  --radius-large: 1rem;
  --radius-pill: 999px;

  --width-content: 72rem;
  --width-text: 42rem;
  --size-touch-target: 2.75rem;
  --duration-transition: 150ms;

  --icon-bell: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 17v-6a6 6 0 0 1 12 0v6l1.5 2h-15z'/%3E%3Cpath d='M10 21a2 2 0 0 0 4 0'/%3E%3C/svg%3E");
  --icon-check: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E");
  --icon-not-allowed: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M5.7 5.7l12.6 12.6'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #18181b;
    --color-surface: #1f1f23;
    --color-card: #27272a;
    --color-border: #3f3f46;
    --color-border-strong: #71717a;
    --color-text: #f4f4f5;
    --color-text-muted: #a1a1aa;
    --color-accent: #4caf50;
    --color-accent-hover: #66bb6a;
    --color-on-accent: #18181b;
    --color-link: #4caf50;
    --color-focus-ring: #4caf50;
    --color-segment-tint: #2e5530;
    --color-on-segment-tint: #c8e6c9;
    --shadow-card: none;
  }
}

/* Base */

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

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

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  background-color: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  overflow-wrap: break-word;
}

main {
  flex: 1;
}

/* The skip link moves focus here; the outline would frame the whole page. */
main:focus {
  outline: none;
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-medium);
  line-height: var(--line-height-heading);
  text-wrap: balance;
}

h1 {
  font-size: var(--font-size-heading-1);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-heading-2);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--font-size-heading-3);
}

p,
ul,
ol,
table {
  margin: 0 0 var(--space-medium);
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

code {
  font-family: var(--font-family-monospace);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Utilities and layout */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-container {
  width: 100%;
  max-width: calc(var(--width-content) + 2 * var(--page-gutter));
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.text-content {
  max-width: var(--width-text);
}

.page-section {
  padding-block: var(--space-section);
}

.page-section-alternate {
  background-color: var(--color-surface);
}

.section-label {
  margin-bottom: var(--space-small);
  color: var(--color-link);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lead-text {
  color: var(--color-text-muted);
  font-size: var(--font-size-lead);
}

/* Skip link */

.skip-link {
  position: absolute;
  top: var(--space-small);
  left: var(--space-small);
  z-index: 10;
  padding: var(--space-small) var(--space-medium);
  border-radius: var(--radius-small);
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  transform: translateY(-250%);
}

.skip-link:focus {
  transform: none;
}

/* Buttons */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--size-touch-target);
  padding: 0.625rem 1.25rem;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--duration-transition) ease, border-color var(--duration-transition) ease;
}

.button-primary {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
}

.button-primary:hover {
  background-color: var(--color-accent-hover);
}

.button-secondary {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.button-secondary:hover {
  background-color: var(--color-surface);
}

.button-compact {
  padding: 0.5rem 0.875rem;
  font-size: var(--font-size-small);
}

.button-large {
  min-height: 3.25rem;
  padding: 0.875rem 1.75rem;
  font-size: 1.0625rem;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-medium);
}

/* Site header */

.site-header {
  border-bottom: 1px solid var(--color-border);
}

.site-header-content {
  display: grid;
  grid-template-areas:
    "brand brand"
    "navigation call-to-action";
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-extra-small) var(--space-small);
  padding-block: var(--space-small);
}

.brand-link {
  grid-area: brand;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  min-height: var(--size-touch-target);
  color: var(--color-text);
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  text-decoration: none;
}

.brand-icon {
  width: 2rem;
  height: 2rem;
}

.site-navigation {
  grid-area: navigation;
}

.site-navigation-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.875rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-navigation-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--size-touch-target);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

.site-navigation-link:hover,
.site-navigation-link[aria-current="page"] {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.4em;
}

.site-header-call-to-action {
  grid-area: call-to-action;
}

@media (min-width: 40rem) {
  .site-header-content {
    grid-template-areas: "brand navigation call-to-action";
    grid-template-columns: auto 1fr auto;
    gap: var(--space-large);
  }

  .site-navigation {
    justify-self: end;
  }

  .site-navigation-list {
    gap: 0 var(--space-large);
  }
}

/* Site footer */

.site-footer {
  padding-block: var(--space-extra-large);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-background);
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-small) var(--space-large);
  margin-bottom: var(--space-large);
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  padding-block: var(--space-extra-small);
  color: var(--color-text);
  text-decoration: none;
}

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

.footer-legal {
  margin-bottom: var(--space-extra-small);
}

.footer-legal a {
  color: var(--color-text);
}

.footer-trademark {
  margin-bottom: 0;
}

/* Section headings */

.section-heading {
  max-width: var(--width-text);
  margin-bottom: var(--space-extra-large);
}

.section-heading > :last-child {
  margin-bottom: 0;
}

/* Hero */

.hero-section {
  padding-block: clamp(3rem, 2rem + 5vw, 6.5rem);
}

.hero-layout {
  display: grid;
  align-items: center;
  gap: var(--space-extra-large);
}

.hero-lead {
  max-width: 36rem;
  margin-bottom: var(--space-large);
}

.trust-line {
  margin: var(--space-large) 0 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
}

.trust-separator {
  margin-inline: 0.4em;
}

@media (min-width: 60rem) {
  .hero-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 4rem;
  }
}

/* Example preset card in the hero */

.preset-preview {
  margin: 0;
  padding: var(--space-large);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background-color: var(--color-card);
  box-shadow: var(--shadow-card);
}

.preset-preview-label {
  margin-bottom: var(--space-extra-small);
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.preset-preview-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-extra-small) var(--space-medium);
  margin-bottom: var(--space-large);
}

.preset-preview-name {
  margin: 0;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
}

.preset-preview-total {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.preset-preview-caption {
  display: flex;
  align-items: center;
  gap: var(--space-small);
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.notification-icon {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  background-color: var(--color-link);
  -webkit-mask: var(--icon-bell) center / contain no-repeat;
  mask: var(--icon-bell) center / contain no-repeat;
}

/* Segment bar: one list item per step, width proportional to its minutes */

.segment-bar {
  display: flex;
  gap: 3px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.segment {
  container: segment / inline-size;
  position: relative;
  display: flex;
  flex: var(--segment-minutes) 1 0;
  align-items: center;
  justify-content: center;
  min-width: 0;
  height: 2.75rem;
  border-radius: 4px;
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  font-weight: var(--font-weight-bold);
}

.segment:nth-child(even) {
  background-color: var(--color-segment-tint);
  color: var(--color-on-segment-tint);
}

.segment-label {
  min-width: 0;
  padding-inline: 0.25rem;
  overflow: hidden;
  white-space: nowrap;
}

/* Narrow steps drop the unit, then the whole label; screen readers still get both. */
@container segment (max-width: 3.75rem) {
  .segment-unit {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
}

@container segment (max-width: 1.75rem) {
  .segment-label {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }
}

.segment-bar-with-notifications {
  margin-bottom: 2.25rem;
}

/* A bell under every step boundary, centered on the 3px gap. */
.segment-bar-with-notifications .segment::after {
  content: "";
  position: absolute;
  top: calc(100% + 0.5rem);
  right: calc(-0.5rem - 1.5px);
  width: 1rem;
  height: 1rem;
  background-color: var(--color-link);
  -webkit-mask: var(--icon-bell) center / contain no-repeat;
  mask: var(--icon-bell) center / contain no-repeat;
}

.segment-bar-with-notifications .segment:last-child::after {
  right: -0.5rem;
}

/* High contrast mode drops backgrounds, which would merge segments and hide the masked icons. */
@media (forced-colors: active) {
  .segment {
    border: 1px solid CanvasText;
  }

  .notification-icon,
  .segment-bar-with-notifications .segment::after,
  .not-requested-item::before {
    background-color: CanvasText;
    forced-color-adjust: none;
  }
}

/* How it works */

.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: var(--space-large);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step-card {
  padding: var(--space-large);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background-color: var(--color-card);
  counter-increment: step;
}

/* The list already announces positions, so the visible number gets empty alt text. */
.step-card::before {
  content: counter(step);
  content: counter(step) / "";
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: var(--space-medium);
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
}

.step-card h3 {
  margin-bottom: var(--space-small);
}

.step-card p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Example routines */

.routine-list {
  display: grid;
  gap: var(--space-medium);
  margin: 0 0 var(--space-large);
  padding: 0;
  list-style: none;
}

.routine-card {
  padding: var(--space-large);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background-color: var(--color-card);
}

.routine-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-extra-small) var(--space-medium);
  margin-bottom: var(--space-medium);
}

.routine-name {
  margin: 0;
}

.routine-total {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  font-variant-numeric: tabular-nums;
}

.routine-description {
  margin: var(--space-medium) 0 0;
  color: var(--color-text-muted);
}

.routine-note {
  max-width: var(--width-text);
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

/* Features */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: var(--space-large);
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-card {
  padding: var(--space-large);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background-color: var(--color-card);
  box-shadow: var(--shadow-card);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: var(--space-medium);
  border-radius: var(--radius-medium);
  background-color: var(--color-segment-tint);
  color: var(--color-on-segment-tint);
}

.feature-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.feature-card h3 {
  margin-bottom: var(--space-small);
}

.feature-card p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Privacy by design */

.privacy-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: var(--space-large);
  margin-bottom: var(--space-large);
}

.privacy-panel {
  padding: var(--space-large);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background-color: var(--color-card);
}

.permission-list {
  margin: 0;
}

.permission-item {
  padding-block: var(--space-medium);
  border-top: 1px solid var(--color-border);
}

.permission-item:last-child {
  padding-bottom: 0;
}

.permission-name {
  font-weight: var(--font-weight-bold);
}

.permission-reason {
  margin: var(--space-extra-small) 0 0;
  color: var(--color-text-muted);
}

.not-requested-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.not-requested-item {
  position: relative;
  padding: var(--space-medium) 0 var(--space-medium) 2rem;
  border-top: 1px solid var(--color-border);
}

.not-requested-item:last-child {
  padding-bottom: 0;
}

.not-requested-item::before {
  content: "";
  position: absolute;
  top: calc(var(--space-medium) + 0.15em);
  left: 0;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--color-text-muted);
  -webkit-mask: var(--icon-not-allowed) center / contain no-repeat;
  mask: var(--icon-not-allowed) center / contain no-repeat;
}

/* Closing call to action */

.closing-call-to-action {
  text-align: center;
}

.closing-call-to-action .button-group {
  justify-content: center;
}

/* Privacy policy */

.policy-header {
  margin-bottom: var(--space-large);
}

.policy-meta {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.policy-summary {
  margin-bottom: var(--space-extra-large);
  padding: var(--space-large);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background-color: var(--color-surface);
}

.policy-summary h2 {
  margin-bottom: var(--space-medium);
  font-size: var(--font-size-heading-3);
}

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 2rem;
}

.check-list li + li {
  margin-top: var(--space-small);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 0.2em;
  left: 0;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--color-link);
  -webkit-mask: var(--icon-check) center / contain no-repeat;
  mask: var(--icon-check) center / contain no-repeat;
}

.policy-content section + section {
  margin-top: var(--space-extra-large);
}

.policy-content h2 {
  font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
}

.policy-content ul:not([class]) {
  padding-left: 1.25rem;
}

.policy-content ul:not([class]) li + li {
  margin-top: var(--space-small);
}

.table-container {
  margin-bottom: var(--space-medium);
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
}

.data-table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: var(--font-size-small);
}

.data-table th,
.data-table td {
  padding: var(--space-small) var(--space-medium);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.data-table thead th {
  background-color: var(--color-surface);
}

.data-table tbody th {
  font-weight: var(--font-weight-medium);
}

.data-table tbody tr:last-child > * {
  border-bottom: 0;
}

.data-table p {
  margin-bottom: var(--space-small);
}

.data-table p:last-child {
  margin-bottom: 0;
}

.cell-label {
  display: none;
}

@media (max-width: 40rem) {
  .data-table,
  .data-table tbody,
  .data-table tr,
  .data-table th,
  .data-table td {
    display: block;
  }

  .data-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .data-table th,
  .data-table td {
    border-bottom: 0;
  }

  .data-table tbody tr {
    padding-block: var(--space-small) var(--space-medium);
  }

  .data-table tbody tr + tr {
    border-top: 1px solid var(--color-border);
  }

  .data-table tbody th {
    font-weight: var(--font-weight-bold);
  }

  .data-table td {
    padding-block: var(--space-extra-small);
  }

  .cell-label {
    display: block;
    margin-bottom: var(--space-extra-small);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
}

.permission-list + p {
  margin-top: var(--space-medium);
}

@media (forced-colors: active) {
  .check-list li::before {
    background-color: CanvasText;
    forced-color-adjust: none;
  }
}