/* =============================================================================
   YerMeds — main.css
   Mobile-first. All colours and spacing via CSS custom properties.
   ============================================================================= */

/* =============================================================================
   1. CUSTOM PROPERTIES
   ============================================================================= */

:root {
  /* Colours */
  --colour-primary:       #0057A8;
  --colour-primary-dark:  #003F7A;
  --colour-accent:        #00A878;
  --colour-neutral-dark:  #1A1A2E;
  --colour-neutral-mid:   #6B7280;
  --colour-neutral-light: #F4F6F9;
  --colour-white:         #FFFFFF;
  --colour-error:         #D64045;

  /* Spacing scale */
  --space-1:  0.25rem;  /*  4px */
  --space-2:  0.5rem;   /*  8px */
  --space-3:  0.75rem;  /* 12px */
  --space-4:  1rem;     /* 16px */
  --space-6:  1.5rem;   /* 24px */
  --space-8:  2rem;     /* 32px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */

  /* Layout */
  --sidebar-width:    240px;
  --bottom-nav-height: 64px;

  /* Z-index */
  --z-nav:     100;
  --z-skip:    200;

  /* Typography */
  --font-system: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, Helvetica, Arial, sans-serif;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}


/* =============================================================================
   2. RESET / BASE
   ============================================================================= */

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--colour-neutral-dark);
  background-color: var(--colour-neutral-light);
  min-height: 100dvh;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: var(--colour-primary);
  text-decoration: underline;
}

a:hover {
  color: var(--colour-primary-dark);
}

button {
  font-family: inherit;
  cursor: pointer;
}


/* =============================================================================
   3. TYPOGRAPHY
   ============================================================================= */

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--colour-neutral-dark);
}

h1 { font-size: clamp(1.75rem, 5vw, 2.75rem); }
h2 { font-size: clamp(1.375rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
  max-width: 65ch;
}

p + p {
  margin-top: var(--space-4);
}


/* =============================================================================
   4. LAYOUT
   ============================================================================= */

/* Mobile: single column, reserve space at bottom for the nav bar */
body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "header"
    "main"
    "footer";
  padding-bottom: var(--bottom-nav-height);
}

.site-header {
  grid-area: header;
  background-color: var(--colour-white);
  border-bottom: 1px solid var(--colour-neutral-light);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.site-header__name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--colour-neutral-dark);
  text-decoration: none;
}

.site-header__name:hover {
  color: var(--colour-primary);
}

.site-main {
  grid-area: main;
  padding: var(--space-6) var(--space-4);
}

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

/* Desktop: sidebar + content */
@media (min-width: 1024px) {
  body {
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr auto;
    grid-template-areas:
      "sidebar main"
      "sidebar footer";
    padding-bottom: 0;
  }

  .site-header {
    display: none; /* sidebar takes over branding at desktop */
  }

  .site-main {
    padding: var(--space-12) var(--space-8);
  }
}

/* Content width cap */
.content-wrap {
  max-width: 860px;
}


/* =============================================================================
   5. NAVIGATION
   ============================================================================= */

/* ---- Mobile bottom bar ---- */

.nav-bottom {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  display: flex;
  background-color: var(--colour-white);
  border-top: 2px solid var(--colour-neutral-light);
  z-index: var(--z-nav);
}

.nav-bottom__list {
  display: flex;
  width: 100%;
}

.nav-bottom__item {
  flex: 1;
}

.nav-bottom__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 44px; /* WCAG 2.5.5 touch target */
  padding: var(--space-1) var(--space-2);
  text-decoration: none;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--colour-neutral-mid);
  gap: var(--space-1);
  transition: color 0.15s ease;
}

.nav-bottom__link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-bottom__link:hover,
.nav-bottom__link[aria-current="page"] {
  color: var(--colour-primary);
}

.nav-bottom__link[aria-current="page"] {
  font-weight: 700;
}

/* ---- Desktop sidebar ---- */

.nav-sidebar {
  display: none;
}

@media (min-width: 1024px) {
  .nav-bottom {
    display: none;
  }

  .nav-sidebar {
    grid-area: sidebar;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100dvh;
    overflow-y: auto;
    padding: var(--space-8) var(--space-6);
    background-color: var(--colour-neutral-dark);
  }

  .nav-sidebar__brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    margin-bottom: var(--space-8);
  }

  .nav-sidebar__logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
  }

  .nav-sidebar__name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--colour-white);
  }

  .nav-sidebar__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }

  .nav-sidebar__link {
    display: block;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    transition: background-color 0.15s ease, color 0.15s ease;
  }

  .nav-sidebar__link:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--colour-white);
  }

  .nav-sidebar__link[aria-current="page"] {
    background-color: var(--colour-primary);
    color: var(--colour-white);
    font-weight: 700;
  }
}


/* =============================================================================
   6. SKIP LINK
   ============================================================================= */

.skip-link {
  position: absolute;
  top: -999px;
  left: var(--space-4);
  z-index: var(--z-skip);
  padding: var(--space-3) var(--space-6);
  background-color: var(--colour-primary);
  color: var(--colour-white);
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
}

.skip-link:focus {
  top: var(--space-4);
}


/* =============================================================================
   7. COMPONENTS
   ============================================================================= */

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  min-height: 44px; /* WCAG touch target */
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--colour-primary);
  color: var(--colour-white);
}

.btn--primary:hover {
  background-color: var(--colour-primary-dark);
  color: var(--colour-white);
}

.btn--accent {
  background-color: var(--colour-accent);
  color: var(--colour-white);
}

.btn--accent:hover {
  background-color: #008a62;
  color: var(--colour-white);
}

.btn--outline {
  background-color: transparent;
  border-color: var(--colour-primary);
  color: var(--colour-primary);
}

.btn--outline:hover {
  background-color: var(--colour-primary);
  color: var(--colour-white);
}

/* ---- Cards ---- */

.card {
  background-color: var(--colour-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.card__body {
  color: var(--colour-neutral-mid);
  font-size: 0.9375rem;
}

/* ---- Feature grid ---- */

.feature-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---- Hero ---- */

.hero {
  padding: var(--space-8) 0;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.hero__app-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
}

.hero__tag {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--colour-primary);
}

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

.hero__subheading {
  font-size: 1.125rem;
  color: var(--colour-neutral-mid);
  margin-bottom: var(--space-6);
  max-width: 52ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---- Screenshot strip ---- */

.screenshot-strip {
  margin-top: var(--space-12);
}

.screenshot-strip__heading {
  margin-bottom: var(--space-6);
}

.screenshot-strip__scroll {
  display: flex;
  min-width: 0;
  gap: var(--space-4);
  overflow-x: auto;
  padding-bottom: var(--space-4);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.screenshot-strip__scroll::-webkit-scrollbar {
  height: 6px;
}

.screenshot-strip__scroll::-webkit-scrollbar-track {
  background: var(--colour-neutral-light);
  border-radius: 3px;
}

.screenshot-strip__scroll::-webkit-scrollbar-thumb {
  background: var(--colour-neutral-mid);
  border-radius: 3px;
}

.screenshot-strip__img {
  flex-shrink: 0;
  width: 200px;
  border-radius: var(--radius-lg);
  scroll-snap-align: start;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

@media (min-width: 640px) {
  .screenshot-strip__img {
    width: 240px;
  }
}

/* ---- Step sections (how-it-works) ---- */

.steps {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.step {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 768px) {
  .step {
    grid-template-columns: 1fr 1fr;
  }

  .step--reverse .step__image {
    order: -1;
  }
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--colour-primary);
  color: var(--colour-white);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  flex-shrink: 0;
}

.step__heading {
  margin-bottom: var(--space-3);
}

.step__body {
  color: var(--colour-neutral-mid);
}

.step__image {
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
}

/* ---- Form ---- */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.form-group label {
  font-weight: 600;
  font-size: 0.9375rem;
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--colour-neutral-mid);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  color: var(--colour-neutral-dark);
  background-color: var(--colour-white);
  transition: border-color 0.15s ease;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--colour-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-group--honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ---- Alert banners ---- */

.alert {
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  font-weight: 500;
}

.alert--success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.alert--error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* ---- Testing notice ---- */

.testing-notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  background-color: var(--colour-neutral-light);
  border: 1px solid var(--colour-primary);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
  font-size: 0.875rem;
  color: var(--colour-neutral-dark);
}

.testing-notice[hidden] {
  display: none;
}

.testing-notice__body {
  flex: 1;
  min-width: 0;
}

.testing-notice__heading {
  margin: 0 0 var(--space-1);
}

.testing-notice__intro,
.testing-notice__footer {
  margin: var(--space-1) 0 0;
}

.testing-notice__steps {
  margin: var(--space-2) 0 0 var(--space-4);
  padding: 0;
}

.testing-notice__steps li {
  margin-bottom: var(--space-1);
}

.testing-notice__steps a {
  color: var(--colour-primary);
  word-break: break-word;
  overflow-wrap: break-word;
}

.testing-notice__steps a:hover,
.testing-notice__steps a:focus {
  color: var(--colour-primary-dark);
}

.testing-notice__dismiss {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--colour-neutral-mid);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0;
  min-width: 44px;
  min-height: 44px;
  align-self: flex-start;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.testing-notice__dismiss:hover,
.testing-notice__dismiss:focus-visible {
  color: var(--colour-neutral-dark);
  background-color: rgba(0, 0, 0, 0.08);
  outline: 2px solid var(--colour-primary);
  outline-offset: 2px;
}

/* Light variant — for use on dark backgrounds (e.g. cta-block) */
.testing-notice--light {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--colour-white);
}

.testing-notice--light .testing-notice__dismiss {
  color: rgba(255, 255, 255, 0.7);
}

.testing-notice--light .testing-notice__dismiss:hover,
.testing-notice--light .testing-notice__dismiss:focus-visible {
  color: var(--colour-white);
  background-color: rgba(255, 255, 255, 0.15);
  outline-color: var(--colour-white);
}

.testing-notice--light .testing-notice__steps a {
  color: var(--colour-white);
}

.testing-notice--light .testing-notice__steps a:hover,
.testing-notice--light .testing-notice__steps a:focus {
  color: rgba(255, 255, 255, 0.8);
}

/* ---- Privacy callout ---- */

.callout {
  background-color: var(--colour-white);
  border-left: 4px solid var(--colour-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-4) var(--space-6);
  margin: var(--space-8) 0;
}

.callout__title {
  font-weight: 700;
  margin-bottom: var(--space-2);
}

/* ---- Page hero (inner pages) ---- */

.page-hero {
  padding: var(--space-8) 0 var(--space-6);
  border-bottom: 1px solid var(--colour-neutral-light);
  margin-bottom: var(--space-8);
}

.page-hero__heading {
  margin-bottom: var(--space-3);
}

.page-hero__intro {
  font-size: 1.125rem;
  color: var(--colour-neutral-mid);
  max-width: 55ch;
}

/* ---- CTA block ---- */

.cta-block {
  background-color: var(--colour-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  margin-top: var(--space-12);
}

.cta-block__heading {
  color: var(--colour-white);
  margin-bottom: var(--space-3);
}

.cta-block__body {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-6);
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Footer ---- */

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-4);
  border-top: 1px solid var(--colour-neutral-light);
  background-color: var(--colour-white);
}

.site-footer__copy {
  font-size: 0.875rem;
  color: var(--colour-neutral-mid);
  max-width: none;
}

.site-footer__links {
  display: flex;
  gap: var(--space-6);
}

.site-footer__links a {
  font-size: 0.875rem;
  color: var(--colour-neutral-mid);
}

.site-footer__links a:hover {
  color: var(--colour-primary);
}

@media (min-width: 1024px) {
  .site-footer__inner {
    padding: var(--space-6) var(--space-8);
  }
}


/* =============================================================================
   8. UTILITIES
   ============================================================================= */

/* Visually hidden but accessible to screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus ring — keyboard only */
:focus-visible {
  outline: 3px solid var(--colour-accent);
  outline-offset: 2px;
}

/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }


/* =============================================================================
   9. PAGE-SPECIFIC
   ============================================================================= */

/* Privacy policy — long-form reading layout */
.page-privacy-policy .site-main {
  font-size: 0.9375rem;
}

.page-privacy-policy h2 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.page-privacy-policy h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}