/* ==========================================================================
   حاسبة العمر - Main stylesheet
   Mobile-first, RTL, CSS logical properties.
   Sections: variables, reset, base, header, hero, footer, calculator form, results.
   ========================================================================== */

/* ---------- CSS variables ---------- */
:root {
  /* Colors */
  --color-primary: #0f766e;        /* calm teal */
  --color-primary-dark: #115e59;
  --color-primary-light: #ccfbf1;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f8f8;
  --color-text: #1f2937;
  --color-text-muted: #4b5563;
  --color-border: #e5e7eb;
  --color-white: #ffffff;

  /* Typography */
  --font-main: "Tajawal", system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-xxl: 2.25rem;
  --lh-base: 1.8;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-xxl: 3rem;

  /* Layout */
  --container-max: 1100px;
  --container-pad: 1rem;
  --header-height: 64px;
  --tap-size: 44px;               /* minimum touch target */

  /* Extra colors (Step 3) */
  --color-primary-50: #f0fdfa;
  --color-primary-border: #99f6e4;
  --color-hijri: #92400e;          /* warm accent for Hijri boxes */
  --color-hijri-bg: #fffbeb;
  --color-hijri-border: #fde68a;
  --color-error: #b91c1c;
  --color-error-bg: #fef2f2;
  --color-success: #15803d;
  --color-whatsapp: #15803d;
  --color-x: #111827;
  --color-select-border: #9ca3af;

  /* Misc */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 1px 3px rgba(15, 23, 42, 0.06), 0 6px 20px rgba(15, 118, 110, 0.08);
  --shadow-lg: 0 2px 6px rgba(15, 23, 42, 0.06), 0 16px 40px rgba(15, 118, 110, 0.14);
  --transition: 0.2s ease;
}

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

* {
  margin: 0;
  padding: 0;
}

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

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

body {
  min-block-size: 100vh;
  font-family: var(--font-main);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

input,
button,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

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

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  line-height: 1.4;
  font-weight: 700;
}

/* Visible keyboard focus everywhere */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Utilities ---------- */
.container {
  inline-size: 100%;
  max-inline-size: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Skip link: hidden until focused */
.skip-link {
  position: absolute;
  inset-block-start: -100px;
  inset-inline-start: var(--space-md);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  inset-block-start: var(--space-sm);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  background: var(--color-bg);
  border-block-end: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  min-block-size: var(--header-height);
}

.site-logo {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-primary);
}

.site-logo:hover {
  text-decoration: none;
}

/* Hamburger button (label for the hidden checkbox) */
.nav-toggle-label {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: var(--tap-size);
  block-size: var(--tap-size);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle:focus-visible + .nav-toggle-label {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Three lines drawn with one span + pseudo-elements */
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  position: relative;
  inline-size: 24px;
  block-size: 3px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), background var(--transition);
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
}

.hamburger::before {
  inset-block-start: -8px;
}

.hamburger::after {
  inset-block-start: 8px;
}

/* Hamburger turns into an X when open */
.nav-toggle:checked + .nav-toggle-label .hamburger {
  background: transparent;
}

.nav-toggle:checked + .nav-toggle-label .hamburger::before {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle:checked + .nav-toggle-label .hamburger::after {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile nav: hidden by default, full-width dropdown when open */
.site-nav {
  display: none;
  inline-size: 100%;
  padding-block-end: var(--space-md);
}

.nav-toggle:checked ~ .site-nav {
  display: block;
}

.nav-list a {
  display: flex;
  align-items: center;
  min-block-size: var(--tap-size);
  padding-inline: var(--space-sm);
  color: var(--color-text);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

/* Desktop nav: inline menu, no hamburger */
@media (min-width: 900px) {
  .header-inner {
    flex-wrap: nowrap;
  }

  /* Hide the checkbox too, so it is not an invisible keyboard tab stop */
  .nav-toggle,
  .nav-toggle-label {
    display: none;
  }

  .site-nav {
    display: block;
    inline-size: auto;
    padding-block-end: 0;
  }

  .nav-list {
    display: flex;
    gap: var(--space-xs);
  }

  .nav-list a {
    padding-inline: var(--space-md);
  }
}

/* ---------- Hero ---------- */
/* Compact on mobile so the calculator starts near the top of the screen */
.hero {
  padding-block: var(--space-lg) var(--space-md);
  text-align: center;
  background: var(--color-bg-alt);
}

.hero h1 {
  font-size: var(--fs-xl);
  color: var(--color-primary-dark);
  margin-block-end: var(--space-xs);
}

.hero-intro {
  max-inline-size: 640px;
  margin-inline: auto;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .hero {
    padding-block: var(--space-xxl) var(--space-lg);
  }

  .hero h1 {
    font-size: var(--fs-xxl);
    margin-block-end: var(--space-sm);
  }

  .hero-intro {
    font-size: var(--fs-md);
    line-height: var(--lh-base);
  }
}

/* ---------- Main sections ---------- */
.content-section,
.faq-section {
  padding-block: var(--space-xl);
}

/* The hero color continues behind the top of the calculator card */
.calculator-section {
  padding-block: 0 var(--space-xl);
  background: linear-gradient(to bottom, var(--color-bg-alt) 0, var(--color-bg-alt) 96px, var(--color-bg) 96px);
}

/* Reserved space for future ads (no ad code yet); usage: <div class="ad-slot"></div> */
.ad-slot {
  min-block-size: 280px;
  margin-block: var(--space-xl);
}

@media (min-width: 768px) {
  .ad-slot {
    min-block-size: 250px;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  margin-block-start: var(--space-xxl);
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  padding-block: var(--space-xl);
}

.footer-title {
  font-size: var(--fs-md);
  margin-block-end: var(--space-sm);
}

.footer-col a {
  display: inline-flex;
  align-items: center;
  min-block-size: var(--tap-size);
  color: var(--color-primary-light);
}

.footer-col a:hover {
  color: var(--color-white);
}

.site-footer :focus-visible {
  outline-color: var(--color-white);
}

.footer-bottom {
  padding-block: var(--space-md);
  border-block-start: 1px solid rgba(255, 255, 255, 0.2);
  font-size: var(--fs-sm);
  text-align: center;
}

@media (min-width: 600px) {
  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   Calculator: form
   ========================================================================== */
.calc-form {
  display: grid;
  gap: var(--space-lg);
  max-inline-size: 680px;
  margin-inline: auto;
  padding: var(--space-lg) var(--space-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

@media (min-width: 600px) {
  .calc-form {
    padding: var(--space-xl);
  }
}

.calc-form fieldset {
  border: 0;
  min-inline-size: 0;
}

.field-legend {
  margin-block-end: var(--space-sm);
  font-weight: 700;
}

.cal-hint,
.field-hint {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: 400;
}

.field-hint {
  margin-block-start: var(--space-sm);
}

/* ---------- Calendar toggle: segmented control ---------- */
.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
  padding: var(--space-xs);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
}

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

.segmented label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-block-size: var(--tap-size);
  border-radius: var(--radius-pill);
  font-weight: 700;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.segmented label:hover {
  color: var(--color-primary-dark);
}

.segmented input:checked + label {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(15, 118, 110, 0.35);
}

.segmented input:focus-visible + label {
  outline: 3px solid var(--color-primary-dark);
  outline-offset: 2px;
}

/* ---------- Day / month / year dropdowns: always one row ---------- */
.date-selects {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--space-sm);
}

.field {
  display: grid;
  gap: var(--space-xs);
  min-inline-size: 0;
}

.field label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.field select {
  inline-size: 100%;
  min-block-size: 48px;
  padding-inline: 0.5rem 1.5rem;
  font-size: var(--fs-base);   /* 16px: prevents zoom on iOS */
  font-weight: 500;
  text-overflow: ellipsis;
  background-color: var(--color-bg);
  /* Chevron icon on the inline-end side (left in RTL) */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234b5563' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 14px;
  background-position: left 0.45rem center;
  border: 1px solid var(--color-select-border);
  border-radius: var(--radius-sm);
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

[dir="ltr"] .field select {
  background-position: right 0.5rem center;
}

.field select:hover {
  border-color: var(--color-primary);
}

.field select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.3);
}

/* ---------- Optional target date ---------- */
.target-date {
  border: 1px dashed var(--color-primary-border);
  border-radius: var(--radius-md);
  background: var(--color-primary-50);
}

.target-date summary {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-block-size: var(--tap-size);
  padding-inline: var(--space-md);
  color: var(--color-primary-dark);
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-md);
}

.target-date summary::-webkit-details-marker {
  display: none;
}

/* Rotating chevron */
.target-date summary::after {
  content: "";
  inline-size: 8px;
  block-size: 8px;
  margin-inline-start: auto;
  border-block-end: 2px solid currentColor;
  border-inline-start: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform var(--transition);
}

.target-date[open] summary::after {
  transform: rotate(135deg);
}

.target-date > fieldset {
  padding: 0 var(--space-md) var(--space-md);
}

/* ---------- Validation errors ---------- */
.form-error {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-error);
  background: var(--color-error-bg);
  border: 1px solid #fecaca;
  border-inline-start: 4px solid var(--color-error);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.form-error::before {
  content: "⚠️";
  flex-shrink: 0;
}

.form-error[hidden] {
  display: none;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.form-actions {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-block-size: var(--tap-size);
  padding-inline: var(--space-md);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-primary-dark);
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn:hover {
  background: var(--color-primary-50);
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-icon {
  flex-shrink: 0;
  inline-size: 20px;
  block-size: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-primary {
  min-block-size: 52px;
  font-size: var(--fs-md);
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 6px 18px rgba(15, 118, 110, 0.38);
}

.btn-secondary {
  min-block-size: 52px;
  padding-inline: var(--space-sm);
  white-space: nowrap;
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-muted);
  font-weight: 500;
}

.btn-secondary:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.btn-small {
  font-size: var(--fs-sm);
  font-weight: 500;
}

/* "Copied" confirmation state (toggled by main.js) */
.btn.is-copied {
  background: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-white);
}

/* ==========================================================================
   Results
   ========================================================================== */
.results {
  display: grid;
  gap: var(--space-md);
  max-inline-size: 900px;
  margin-inline: auto;
  margin-block-start: var(--space-xl);
  scroll-margin-block-start: calc(var(--header-height) + var(--space-md));
}

.results[hidden] {
  display: none;
}

.results-title {
  font-size: var(--fs-lg);
  text-align: center;
  color: var(--color-primary-dark);
}

/* Focus is moved here programmatically; no ring needed for that */
.results-title:focus {
  outline: none;
}

/* Gentle fade-in when results appear (transform/opacity only: no layout shift) */
@media (prefers-reduced-motion: no-preference) {
  .results:not([hidden]) > * {
    animation: fade-up 0.45s ease both;
  }

  .results > :nth-child(2) { animation-delay: 0.04s; }
  .results > :nth-child(3) { animation-delay: 0.08s; }
  .results > :nth-child(4) { animation-delay: 0.12s; }
  .results > :nth-child(n + 5) { animation-delay: 0.16s; }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Cards ---------- */
.result-card {
  padding: var(--space-lg) var(--space-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

@media (min-width: 600px) {
  .result-card {
    padding: var(--space-lg);
  }
}

.card-title {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--space-sm);
  margin-block-end: var(--space-md);
  font-size: var(--fs-md);
  color: var(--color-text);
}

.card-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 36px;
  block-size: 36px;
  font-size: 1.1rem;
  background: var(--color-primary-50);
  border-radius: var(--radius-sm);
}

.badge {
  flex-shrink: 0;
  margin-inline-start: auto;
  white-space: nowrap;
  padding: 0 var(--space-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-hijri);
  background: var(--color-hijri-bg);
  border: 1px solid var(--color-hijri-border);
  border-radius: var(--radius-pill);
}

.note {
  margin-block-start: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
}

.note[hidden] {
  display: none;
}

/* ---------- 1. Main result (focal point) ---------- */
.result-main {
  padding-block: var(--space-xl);
  text-align: center;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border: 0;
  box-shadow: var(--shadow-lg);
}

.result-label {
  font-weight: 500;
  opacity: 0.92;
}

.result-big {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm);
  max-inline-size: 520px;
  margin: var(--space-md) auto;
}

.big-part {
  display: grid;
  padding: var(--space-sm) var(--space-xs);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
}

.big-num {
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.big-label {
  font-size: var(--fs-base);
  font-weight: 500;
}

.result-sub {
  font-size: var(--fs-sm);
  opacity: 0.92;
}

@media (min-width: 768px) {
  .big-num {
    font-size: 4rem;
  }

  .big-label {
    font-size: var(--fs-md);
  }
}

/* ---------- 2 & 5. Gregorian / Hijri boxes ---------- */
.calendars-grid {
  display: grid;
  gap: var(--space-md);
}

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

.cal-box {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-primary-border);
  background: var(--color-primary-50);
}

.cal-box-h {
  border-color: var(--color-hijri-border);
  background: var(--color-hijri-bg);
}

.cal-box-title {
  display: inline-block;
  margin-block-end: var(--space-sm);
  padding: 0 var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
}

.cal-box-h .cal-box-title {
  background: var(--color-hijri);
}

.info-list dt {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.info-list dd {
  margin-block-end: var(--space-sm);
  font-size: var(--fs-md);
  font-weight: 700;
}

.info-list dd:last-child {
  margin-block-end: 0;
}

/* ---------- 3. Age in words ---------- */
.words-box {
  display: grid;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md);
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-md);
}

.age-words {
  font-size: var(--fs-md);
  font-weight: 700;
  line-height: 1.7;
  color: var(--color-primary-dark);
}

.words-box .btn {
  justify-self: start;
  min-inline-size: 120px;
}

@media (min-width: 600px) {
  .words-box {
    grid-template-columns: 1fr auto;
  }

  .age-words {
    font-size: var(--fs-lg);
  }
}

/* ---------- 4, 6 & 7. Stat card grids ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.stat {
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 2px;
  padding: var(--space-md) var(--space-sm);
  text-align: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-inline-size: 0;
}

.stat-icon {
  font-size: 1.4rem;
  line-height: 1.3;
}

.stat-label,
.stat-unit,
.unit-label {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.stat-value,
.unit-value {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-primary-dark);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.unit-value {
  font-size: var(--fs-lg);
  line-height: 1.3;
}

/* 5 unit cards: the last one spans the full row on mobile */
.units-grid .stat:last-child {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .stat-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .units-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .units-grid .stat:last-child {
    grid-column: auto;
  }

  .stat-value {
    font-size: var(--fs-lg);
  }
}

/* ---------- 5. Next birthday countdown ---------- */
.nb-date {
  font-size: var(--fs-md);
  font-weight: 700;
}

.nb-info {
  margin-block-end: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* Reserve height so swapping text for number boxes causes no shift */
.countdown {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-sm);
  min-block-size: 68px;
  align-items: center;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.cd-part {
  display: grid;
  padding: var(--space-sm) var(--space-xs);
  text-align: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.cd-num {
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-primary-dark);
  font-variant-numeric: tabular-nums;
}

.cal-box-h .cd-num {
  color: var(--color-hijri);
}

.cd-label {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

/* Text-only states ("متبقٍ ..." or "عيد ميلاد سعيد") span the whole row */
.countdown:not(:has(.cd-part)) {
  display: flex;
  justify-content: center;
  padding: var(--space-sm);
  text-align: center;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

/* ---------- 8. Share ---------- */
.share-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .share-actions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.btn-share {
  font-size: var(--fs-sm);
}

.btn-whatsapp {
  background: var(--color-whatsapp);
  border-color: var(--color-whatsapp);
  color: var(--color-white);
}

.btn-whatsapp:hover {
  background: #166534;
}

.btn-x {
  background: var(--color-x);
  border-color: var(--color-x);
  color: var(--color-white);
}

.btn-x:hover {
  background: #374151;
}

/* Screen-reader + visual feedback; fixed height so it never shifts content */
.copy-status {
  min-block-size: 1.8em;
  text-align: center;
  font-weight: 500;
  color: var(--color-success);
}

/* ==========================================================================
   Article (homepage SEO content)
   ========================================================================== */
.content-section {
  padding-block: var(--space-xxl) var(--space-xl);
}

.article {
  max-inline-size: 760px;
  margin-inline: auto;
  font-size: 1.0625rem;
  line-height: 1.95;
}

.article p {
  margin-block-end: var(--space-md);
}

.article-lead {
  font-size: var(--fs-md);
  color: var(--color-text);
}

.article h2 {
  margin-block: var(--space-xxl) var(--space-md);
  padding-inline-start: var(--space-sm);
  font-size: var(--fs-lg);
  color: var(--color-primary-dark);
  border-inline-start: 4px solid var(--color-primary);
}

.article h3 {
  margin-block: var(--space-xl) var(--space-sm);
  font-size: var(--fs-md);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .article h2 {
    font-size: var(--fs-xl);
  }
}

/* Body links: underlined so they are not identified by color alone */
.article a:not(.btn),
.faq-answer a {
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.article a:not(.btn):hover,
.faq-answer a:hover {
  color: var(--color-primary-dark);
  text-decoration-thickness: 2px;
}

/* ---------- Lists ---------- */
.article ul,
.article ol {
  display: grid;
  gap: var(--space-sm);
  margin-block-end: var(--space-lg);
}

/* Numbered steps with round counters */
.steps-list {
  counter-reset: step;
}

.steps-list li {
  position: relative;
  padding-inline-start: 2.75rem;
  counter-increment: step;
}

.steps-list li::before {
  content: counter(step);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.15em;
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 2rem;
  block-size: 2rem;
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: 50%;
}

/* Check-mark bullet list */
.check-list li {
  position: relative;
  padding-inline-start: 1.75rem;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  inset-inline-start: 0;
  font-weight: 700;
  color: var(--color-primary);
}

/* Worked example box */
.example-steps {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-border);
  border-inline-start: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
}

.example-steps li {
  position: relative;
  padding-inline-start: 1.25rem;
}

.example-steps li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.85em;
  inline-size: 7px;
  block-size: 7px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ---------- Comparison table (scrolls inside its box if ever too wide) ---------- */
.table-wrap {
  margin-block: var(--space-lg);
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.compare-table {
  inline-size: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.compare-table caption {
  padding: var(--space-sm) var(--space-md);
  font-weight: 700;
  text-align: start;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border-block-end: 1px solid var(--color-border);
}

.compare-table th,
.compare-table td {
  padding: var(--space-sm);
  text-align: start;
  vertical-align: top;
  border-block-end: 1px solid var(--color-border);
}

.compare-table thead th {
  color: var(--color-white);
  background: var(--color-primary);
}

.compare-table tbody th {
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--color-primary-50);
}

.compare-table tbody tr:nth-child(even) td {
  background: var(--color-bg-alt);
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-block-end: 0;
}

@media (min-width: 600px) {
  .compare-table {
    font-size: var(--fs-base);
  }

  .compare-table th,
  .compare-table td {
    padding: var(--space-sm) var(--space-md);
  }
}

/* Inline equations: keep left-to-right order and on one line */
.math {
  display: inline-block;
  direction: ltr;
  unicode-bidi: isolate;
  white-space: nowrap;
}

.article-cta {
  margin-block-start: var(--space-lg);
  text-align: center;
}

.article-cta .btn {
  padding-inline: var(--space-xl);
}

/* ==========================================================================
   FAQ accordion
   ========================================================================== */
.faq-section {
  padding-block: var(--space-xxl);
  background: var(--color-bg-alt);
}

.faq-title {
  margin-block-end: var(--space-lg);
  font-size: var(--fs-lg);
  text-align: center;
  color: var(--color-primary-dark);
}

@media (min-width: 768px) {
  .faq-title {
    font-size: var(--fs-xl);
  }
}

.faq-list {
  display: grid;
  gap: var(--space-sm);
  max-inline-size: 760px;
  margin-inline: auto;
}

.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition);
}

.faq-item[open] {
  border-color: var(--color-primary-border);
}

.faq-item summary {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-block-size: 56px;
  padding: var(--space-sm) var(--space-md);
  font-weight: 700;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-md);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--color-primary-dark);
}

/* Plus icon that turns into a minus when open */
.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 28px;
  block-size: 28px;
  margin-inline-start: auto;
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1;
  color: var(--color-primary);
  background: var(--color-primary-50);
  border-radius: 50%;
}

.faq-item[open] summary::after {
  content: "−";
  color: var(--color-white);
  background: var(--color-primary);
}

.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  line-height: 1.9;
  color: var(--color-text-muted);
}

/* Anchor targets are not hidden under the sticky header */
#calculator,
#faq,
.article h2 {
  scroll-margin-block-start: calc(var(--header-height) + var(--space-md));
}

/* ==========================================================================
   Tool pages (Step 6)
   ========================================================================== */
/* Age difference form: one card per person */
.person-group {
  display: grid;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border) !important;
  border-radius: var(--radius-md);
}

.person-legend {
  padding: 0 var(--space-md);
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
}

.person-group + .person-group .person-legend {
  background: var(--color-hijri);
}

.person-group .segmented {
  background: var(--color-bg);
}

/* Hijri months list (numbered grid) */
.article .month-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-xs) var(--space-md);
  counter-reset: month;
}

.month-list li {
  position: relative;
  padding: var(--space-xs) var(--space-sm);
  padding-inline-start: 2.5rem;
  background: var(--color-primary-50);
  border-radius: var(--radius-sm);
  counter-increment: month;
}

.month-list li::before {
  content: counter(month);
  position: absolute;
  inset-inline-start: var(--space-sm);
  font-weight: 700;
  color: var(--color-primary);
}

@media (min-width: 600px) {
  .article .month-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Breadcrumb (inner pages) */
.breadcrumb {
  margin-block-end: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
}

.breadcrumb li + li::before {
  content: "‹";
  margin-inline-end: var(--space-xs);
  color: var(--color-text-muted);
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  min-block-size: 32px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ==========================================================================
   Trust pages + 404 (Step 6B)
   ========================================================================== */
.page-content {
  padding-block-start: var(--space-xl);
}

.page-content .article h2:first-child,
.page-meta + h2 {
  margin-block-start: var(--space-lg);
}

/* "Last updated" line */
.page-meta {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-radius: var(--radius-pill);
}

/* Contact card */
.contact-card {
  display: grid;
  justify-items: center;
  gap: var(--space-sm);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.article .contact-card h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: var(--fs-lg);
}

.contact-icon {
  inline-size: 56px;
  block-size: 56px;
  font-size: 1.6rem;
  background: var(--color-bg);
}

.article .contact-card p {
  margin: 0;
}

.contact-email a {
  font-size: var(--fs-lg);
  font-weight: 700;
  overflow-wrap: anywhere;
}

/* 404 */
.hero-404 {
  padding-block: var(--space-xxl);
}

.error-code {
  font-size: 5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary); /* solid colour: keeps text contrast above 3:1 */
}

.error-actions {
  margin-block-start: var(--space-lg);
}

.article .tool-links {
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .article .tool-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.article .tool-links a {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  block-size: 100%;
  padding: var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.article .tool-links a:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.tool-desc {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* Current page in the footer */
.footer-col a[aria-current="page"] {
  color: var(--color-white);
  font-weight: 700;
}