/* =========================================================
   Amar Hashi Foundation — Concept Design
   Warm editorial minimalism · Cream + Terracotta
   ========================================================= */

:root,
[data-theme='light'] {
  /* Surfaces — airy off-white with a hint of blue */
  --color-bg: #f4f8fb;
  --color-surface: #fafcfe;
  --color-surface-2: #ffffff;
  --color-surface-offset: #e6eef5;
  --color-surface-offset-2: #d9e4ee;
  --color-surface-dynamic: #c8d6e3;
  --color-divider: #d5e0ea;
  --color-border: #b8c8d6;

  /* Text — deep navy charcoal */
  --color-text: #142236;
  --color-text-muted: #56687e;
  --color-text-faint: #94a4b6;
  --color-text-inverse: #fafcfe;

  /* Primary — Sky Blue */
  --color-primary: #2d8ccd;
  --color-primary-hover: #1e6fa8;
  --color-primary-active: #144e7a;
  --color-primary-highlight: #d4e8f6;

  /* Secondary accent — Deeper blue for depth */
  --color-accent: #4fb0e0;
  --color-accent-hover: #2d8ccd;

  /* Semantic */
  --color-success: #2f7a5a;
  --color-warning: #d69120;
  --color-error: #b8384f;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows — cool blue-tinted */
  --shadow-sm: 0 1px 2px rgba(20, 40, 70, 0.06);
  --shadow-md: 0 6px 20px rgba(20, 40, 70, 0.09);
  --shadow-lg: 0 20px 48px rgba(20, 40, 70, 0.14);

  /* Widths */
  --content-narrow: 640px;
  --content-default: 1040px;
  --content-wide: 1240px;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 6vw, 6.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Instrument Serif', 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', system-ui, sans-serif;
}

[data-theme='dark'] {
  --color-bg: #0d1622;
  --color-surface: #131e2d;
  --color-surface-2: #182538;
  --color-surface-offset: #1c2c42;
  --color-surface-offset-2: #22344d;
  --color-surface-dynamic: #2a405c;
  --color-divider: #1c2c42;
  --color-border: #34496a;
  --color-text: #dce7f2;
  --color-text-muted: #94a4b6;
  --color-text-faint: #56687e;
  --color-text-inverse: #0d1622;
  --color-primary: #5ab0e2;
  --color-primary-hover: #7dc4ea;
  --color-primary-active: #a3d5f0;
  --color-primary-highlight: #1a3854;
  --color-accent: #7dc4ea;
  --color-accent-hover: #a3d5f0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.6);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  transition: background-color 400ms ease, color 400ms ease;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  text-wrap: balance;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

p, li { text-wrap: pretty; max-width: 68ch; }

button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }

a { color: inherit; text-decoration: none; }

::selection { background: var(--color-primary-highlight); color: var(--color-text); }

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

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 300ms ease, padding 300ms ease;
}
.header.scrolled {
  border-bottom-color: var(--color-divider);
  padding: var(--space-3) 0;
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--color-text);
}
.brand-mark { color: var(--color-primary); flex-shrink: 0; }
.brand-name { font-weight: 500; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  position: relative;
  padding: var(--space-1) 0;
  transition: color var(--transition-interactive);
}
.nav a:hover { color: var(--color-text); }
.nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1px;
  background: var(--color-primary);
  transition: width var(--transition-interactive);
}
.nav a:hover::after { width: 100%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.theme-toggle:hover { background: var(--color-surface-offset); color: var(--color-text); }

.mobile-toggle { display: none; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.container-narrow { max-width: var(--content-narrow); }
.container-default { max-width: var(--content-default); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  transition: all var(--transition-interactive);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-text);
  background: var(--color-surface);
}
.btn-arrow { transition: transform var(--transition-interactive); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ---------- Section framing ---------- */
.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section-eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-primary);
}

/* ---------- Hero ---------- */
.hero {
  padding-top: clamp(7rem, 12vw, 10rem);
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-24));
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
  align-items: center;
}
.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.hero-headline em {
  font-style: italic;
  color: var(--color-primary);
}
.hero-lede {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-text-muted);
  max-width: 34ch;
}
.hero-actions {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.hero-image-wrap {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-image-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
}
.hero-image-wrap:hover img { transform: scale(1.03); }
.hero-badge {
  position: absolute;
  top: var(--space-4); left: var(--space-4);
  padding: var(--space-2) var(--space-3);
  background: color-mix(in oklab, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

/* Bengali tagline decorative element */
.hero-bengali {
  position: absolute;
  right: -2%;
  bottom: 8%;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(3rem, 8vw, 6rem);
  color: var(--color-primary);
  opacity: 0.06;
  pointer-events: none;
  white-space: nowrap;
}

/* ---------- Impact stats ---------- */
.stats {
  background: var(--color-surface-offset);
  padding-block: var(--space-16);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}
.stat-item {
  text-align: left;
}
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-label {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* ---------- Mission ---------- */
.mission {
  background: var(--color-bg);
}
.mission-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
  align-items: start;
}
.mission-heading {
  font-size: var(--text-2xl);
  color: var(--color-text);
  position: sticky;
  top: 6rem;
}
.mission-heading em { font-style: italic; color: var(--color-primary); }
.mission-body p {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: 62ch;
}
.mission-body p:last-child { margin-bottom: 0; color: var(--color-text-muted); font-size: var(--text-base); }

/* ---------- Programs ---------- */
.programs { background: var(--color-surface); }
.programs-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
}
.programs-header h2 {
  font-size: var(--text-2xl);
  max-width: 14ch;
}
.programs-header p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 42ch;
}
.programs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}
.program-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.program-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}
.program-image {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.program-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
}
.program-card:hover .program-image img { transform: scale(1.05); }
.program-content {
  padding: var(--space-6) var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.program-number {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}
.program-title {
  font-size: var(--text-xl);
  color: var(--color-text);
}
.program-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}
.program-link {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
}
.program-link:hover { color: var(--color-primary-hover); }
.program-link .btn-arrow { transition: transform var(--transition-interactive); }
.program-link:hover .btn-arrow { transform: translateX(4px); }

/* ---------- Founder ---------- */
.founder { background: var(--color-bg); }
.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
  align-items: center;
}
.founder-image {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.founder-image img { width: 100%; height: 100%; object-fit: cover; object-position: center 25%; }
.founder-image::after {
  content: '';
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
  pointer-events: none;
}
.founder-content h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}
.founder-title {
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}
.founder-quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-xl);
  line-height: 1.35;
  color: var(--color-text);
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-6);
  margin-bottom: var(--space-6);
}
.founder-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}
.founder-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}
.credential {
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ---------- Full bleed image ---------- */
.full-bleed {
  width: 100%;
  height: clamp(400px, 60vh, 640px);
  overflow: hidden;
  position: relative;
}
.full-bleed img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.full-bleed-quote {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-16) var(--space-8);
  background: linear-gradient(180deg, transparent 40%, rgba(10, 20, 40, 0.75) 100%);
}
.full-bleed-quote blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: #fafcfe;
  max-width: 24ch;
  line-height: 1.2;
}
.full-bleed-quote cite {
  display: block;
  margin-top: var(--space-4);
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--text-sm);
  color: #fafcfe;
  opacity: 0.8;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ---------- Stories ---------- */
.stories { background: var(--color-surface); }
.stories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
}
.story {
  padding: var(--space-8);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.story-quote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: var(--color-text);
}
.story-author {
  margin-top: auto;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.story-author strong { display: block; color: var(--color-text); font-weight: 500; }

/* ---------- CTA / Donate ---------- */
.cta {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.cta h2 {
  font-size: var(--text-2xl);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}
.cta p {
  font-size: var(--text-lg);
  opacity: 0.85;
  line-height: 1.5;
  max-width: 40ch;
}
.cta-btn {
  background: var(--color-text-inverse);
  color: var(--color-primary);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-full);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  transition: all var(--transition-interactive);
}
.cta-btn:hover {
  background: var(--color-surface-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.cta-amounts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.cta-amount {
  padding: var(--space-3) var(--space-5);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-inverse);
  transition: all var(--transition-interactive);
}
.cta-amount:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); }

/* ---------- Footer ---------- */
.footer {
  background: var(--color-bg);
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}
.footer-brand p {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 32ch;
  line-height: 1.6;
}
.footer h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.footer ul { list-style: none; }
.footer li { margin-bottom: var(--space-2); }
.footer a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.footer a:hover { color: var(--color-primary); }
.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-socials { display: flex; gap: var(--space-3); }
.footer-socials a {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}
.footer-socials a:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 900ms cubic-bezier(0.16, 1, 0.3, 1), transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-image-wrap { max-width: 480px; margin: 0 auto; aspect-ratio: 4/5; }
  .mission-grid { grid-template-columns: 1fr; }
  .mission-heading { position: static; }
  .programs-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--space-6); }
  .founder-grid { grid-template-columns: 1fr; }
  .stories-grid { grid-template-columns: 1fr; }
  .cta-inner { grid-template-columns: 1fr; text-align: left; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav { display: none; }
  .mobile-toggle {
    display: inline-flex;
    width: 40px; height: 40px;
    align-items: center; justify-content: center;
    color: var(--color-text);
  }
  .programs-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .container { padding: 0 var(--space-4); }
  .hero-bengali { display: none; }
  .full-bleed-quote { padding: var(--space-8) var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}