/* Variables */
:root {
  --color-bg: #f5f7fb;
  --color-bg-strong: #e9eef7;
  --color-surface: rgba(255, 255, 255, 0.84);
  --color-surface-strong: #ffffff;
  --color-text: #142033;
  --color-text-soft: #52627a;
  --color-accent: #1d4ed8;
  --color-accent-soft: rgba(29, 78, 216, 0.1);
  --color-accent-warm: #c2410c;
  --color-success: #15803d;
  --color-border: rgba(20, 32, 51, 0.1);
  --color-shadow: rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 32px 80px rgba(15, 23, 42, 0.12);
  --shadow-md: 0 18px 40px rgba(15, 23, 42, 0.1);
  --shadow-sm: 0 10px 24px rgba(15, 23, 42, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --page-width: 78rem;
  --font-sans:
    "Inter", "Segoe UI", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  --font-display:
    "Merienda", "Inter", "Segoe UI", "SF Pro Display", sans-serif;
  --font-arabic:
    "Aref Ruqaa Ink", "Noto Naskh Arabic", "Amiri", serif;
  --transition-fast: 180ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 20rem;
  min-height: 100vh;
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(29, 78, 216, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(194, 65, 12, 0.1), transparent 22%),
    linear-gradient(180deg, #fbfcff 0%, var(--color-bg) 40%, #edf2fb 100%);
}

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

button,
input,
textarea {
  font: inherit;
}

a {
  color: inherit;
}

textarea {
  resize: vertical;
}

:focus-visible {
  outline: 3px solid rgba(29, 78, 216, 0.35);
  outline-offset: 3px;
}

::selection {
  background: rgba(29, 78, 216, 0.18);
}

/* Layout */
.page-shell {
  width: min(calc(100% - 1.5rem), var(--page-width));
  margin-inline: auto;
  padding: var(--space-5) 0 var(--space-8);
}

.site-header {
  margin-bottom: var(--space-5);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3.5rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.72));
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -6rem -6rem auto;
  width: 18rem;
  aspect-ratio: 1;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.18), rgba(194, 65, 12, 0.16));
  filter: blur(14px);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem 1rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__title {
  max-width: 16ch;
  margin: var(--space-4) 0 var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 1.05;
}

.hero__lead {
  max-width: 52rem;
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--color-text-soft);
}

.hero__quote {
  position: relative;
  margin: var(--space-6) 0 0;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: rgba(20, 32, 51, 0.04);
  border: 1px solid rgba(20, 32, 51, 0.06);
}

.hero__quote p {
  margin: 0;
  font-size: 1.04rem;
}

.quote-signature {
  display: block;
  margin-top: var(--space-3);
  color: var(--color-accent-warm);
  font-weight: 700;
  text-align: right;
}

.hero-story {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.story-card,
.content-card,
.embed-card,
.mini-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.8));
  box-shadow: var(--shadow-md);
}

.story-card {
  display: grid;
  gap: var(--space-5);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.story-card__text {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(20, 32, 51, 0.04);
}

.story-card__text p {
  margin: 0;
}

.story-card__text--arabic {
  direction: rtl;
  text-align: right;
  font-family: var(--font-arabic);
  font-size: clamp(1.1rem, 2.1vw, 1.45rem);
  line-height: 1.95;
}

.story-card__figure {
  margin: 0;
}

.story-card__image {
  width: 100%;
  height: 100%;
  min-height: 20rem;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.story-card__caption {
  margin-top: var(--space-3);
  font-size: 0.95rem;
  color: var(--color-text-soft);
}

.content-grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.content-main,
.content-rail {
  display: grid;
  gap: var(--space-5);
  align-content: start;
}

.content-rail {
  position: sticky;
  top: 1rem;
}

.content-card,
.mini-card,
.embed-card {
  padding: clamp(1.25rem, 3vw, 2rem);
}

/* Components */
.section-title,
.card-title {
  margin: 0 0 var(--space-4);
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  line-height: 1.2;
  color: var(--color-accent);
}

.subsection-title {
  margin: 0 0 var(--space-3);
  font-size: 1.08rem;
  color: var(--color-accent);
}

.prose > *:first-child {
  margin-top: 0;
}

.prose > *:last-child {
  margin-bottom: 0;
}

.prose p,
.prose li {
  color: var(--color-text);
}

.stack-lg,
.stack-md,
.stack-sm {
  display: grid;
}

.stack-lg {
  gap: var(--space-5);
}

.stack-md {
  gap: var(--space-4);
}

.stack-sm {
  gap: var(--space-3);
}

.article-card,
.definition-card,
.activity-card {
  padding: var(--space-5);
  border: 1px solid rgba(20, 32, 51, 0.08);
  border-radius: var(--radius-md);
  background: var(--color-surface-strong);
}

.definition-card__label {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--color-accent-warm);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.formula {
  margin: var(--space-4) 0;
  padding: var(--space-4) var(--space-5);
  overflow-x: auto;
  border: 1px solid rgba(29, 78, 216, 0.1);
  border-left: 4px solid rgba(29, 78, 216, 0.42);
  border-radius: var(--radius-sm);
  background: rgba(29, 78, 216, 0.06);
}

.list {
  padding-left: 1.2rem;
  margin: 0;
}

.list li + li {
  margin-top: var(--space-2);
}

.link-card {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.95rem 1.15rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: none;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.link-card:hover {
  transform: translateY(-1px);
  background: rgba(29, 78, 216, 0.16);
}

.board-grid,
.embed-grid {
  display: grid;
  gap: var(--space-5);
}

.board-shell {
  overflow: hidden;
  width: 100%;
  min-height: 18rem;
  border: 1px solid rgba(20, 32, 51, 0.1);
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.board-shell--sm {
  min-height: 16rem;
}

.board-shell--md {
  min-height: 21rem;
}

.board-shell--lg {
  min-height: 24rem;
}

.board-shell--tall {
  min-height: 30rem;
}

.board-shell .jxgbox {
  width: 100%;
  height: 100%;
  min-height: inherit;
  background: #ffffff !important;
}

#box {
  min-height: 21rem;
}

.interactive-note {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.controls-card {
  display: grid;
  gap: var(--space-4);
}

.controls-grid {
  display: grid;
  gap: var(--space-3);
}

.control-row {
  display: grid;
  gap: var(--space-2);
}

.control-row label {
  color: var(--color-text-soft);
  font-weight: 700;
}

.control-row input[type="range"] {
  width: 100%;
  accent-color: var(--color-accent);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.875rem;
  padding: 0.75rem 1.1rem;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-accent), #3b82f6);
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    opacity var(--transition-fast);
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(29, 78, 216, 0.2);
}

.button--secondary {
  background: linear-gradient(135deg, #0f766e, #14b8a6);
}

.button--ghost {
  background: rgba(20, 32, 51, 0.06);
  color: var(--color-text);
}

.button--ghost:hover {
  box-shadow: none;
  background: rgba(20, 32, 51, 0.1);
}

.code-input {
  width: 100%;
  min-height: 8rem;
  padding: 1rem;
  border: 1px solid rgba(20, 32, 51, 0.12);
  border-radius: var(--radius-md);
  background: #f8fbff;
  color: var(--color-text);
  font-family:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  line-height: 1.6;
}

.embed-card iframe {
  width: 100%;
  border: 0;
  border-radius: var(--radius-md);
  background: #ffffff;
}

.embed-card--medium iframe {
  min-height: 22rem;
}

.embed-card--tall iframe {
  min-height: 38rem;
}

.note-card {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background: rgba(21, 128, 61, 0.06);
  border: 1px solid rgba(21, 128, 61, 0.14);
}

.note-card strong {
  color: var(--color-accent);
}

.utility-muted {
  color: var(--color-text-soft);
}

.utility-accent {
  color: var(--color-accent);
}

.utility-success {
  color: var(--color-success);
}

/* Responsive */
@media (min-width: 700px) {
  .hero-story {
    grid-template-columns: minmax(0, 1.4fr) minmax(17rem, 0.9fr);
    align-items: center;
  }

  .board-grid,
  .embed-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-shell {
    width: min(calc(100% - 2.5rem), var(--page-width));
    padding-top: var(--space-6);
  }

  .content-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(21rem, 0.9fr);
  }
}

@media (max-width: 979px) {
  .content-rail {
    position: static;
  }
}

@media (max-width: 699px) {
  .page-shell {
    width: min(calc(100% - 1rem), var(--page-width));
    padding-bottom: var(--space-6);
  }

  .hero,
  .content-card,
  .embed-card,
  .mini-card,
  .story-card {
    border-radius: 24px;
  }

  .article-card,
  .definition-card,
  .activity-card {
    padding: var(--space-4);
  }

  .board-shell--sm,
  .board-shell--md,
  .board-shell--lg,
  .board-shell--tall {
    min-height: min(86vw, 28rem);
  }

  .embed-card--medium iframe,
  .embed-card--tall iframe {
    min-height: 20rem;
  }
}