/* Shiksha Abhiyan — Design Tokens
   Palette variants driven by [data-palette] on <html>
   Photo treatment via [data-photo] on <html>
*/

:root {
  /* Default palette: International NGO — warm ivory, deep forest, marigold, rust.
     Inspired by the tonal discipline of Oxfam / Room to Read / CARE. */
  --c-bg: #F6F1E7;
  --c-surface: #FFFFFF;
  --c-surface-2: #ECE4D1;
  --c-ink: #0F1713;
  --c-ink-2: #2E352F;
  --c-muted: #6A6F69;
  --c-line: #DED5BE;
  --c-line-strong: #0F1713;

  --c-primary: #0B3B2E;      /* deep forest */
  --c-primary-ink: #FFFFFF;
  --c-accent: #E9B44C;       /* marigold */
  --c-accent-ink: #0F1713;
  --c-rust: #B23A1F;         /* rust red */
  --c-sky: #2F5B86;

  /* Semantic cause colors — each cause page recolors --c-primary */
  --cause-shiksha: #C1432A;        /* education — rust */
  --cause-maitri: #8E3B66;         /* women — berry */
  --cause-prakriti: #2F6B3A;       /* environment — forest green */
  --cause-anti: #1B3A5B;           /* legal — indigo blue */

  /* Type scale (editorial) */
  --font-display: "Fraunces", "Source Serif 4", Georgia, serif;
  --font-body: "Inter Tight", "Inter", -apple-system, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --fs-0: 12px;
  --fs-1: 14px;
  --fs-2: 16px;
  --fs-3: 18px;
  --fs-4: 22px;
  --fs-5: 28px;
  --fs-6: 36px;
  --fs-7: 48px;
  --fs-8: 64px;
  --fs-9: 84px;
  --fs-10: 112px;

  /* Spacing */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px;

  /* Radii — editorial = subtle */
  --r-1: 2px; --r-2: 6px; --r-3: 12px; --r-4: 20px; --r-pill: 999px;

  --shadow-1: 0 1px 2px rgba(20,20,20,0.06), 0 4px 12px rgba(20,20,20,0.04);
  --shadow-2: 0 4px 20px rgba(20,20,20,0.08), 0 24px 60px rgba(20,20,20,0.10);

  --maxw: 1240px;
  --gutter: clamp(20px, 4vw, 56px);
}

/* ===== Palette variants ===== */

[data-palette="editorial"] { /* default — already above */ }

[data-palette="hopeful"] {
  --c-bg: #FFF7EC;
  --c-surface: #FFFFFF;
  --c-surface-2: #FFE7CC;
  --c-ink: #141414;
  --c-line: #F0E1C7;
  --c-primary: #1B3A5B;
  --c-primary-ink: #FFFFFF;
  --c-accent: #E07A3B;
  --c-rust: #C1432A;
}

[data-palette="bold"] {
  --c-bg: #F6F2EC;
  --c-surface: #FFFFFF;
  --c-surface-2: #E8DCC4;
  --c-ink: #0E0E0E;
  --c-line: #DED5C3;
  --c-primary: #111111;
  --c-primary-ink: #FFFFFF;
  --c-accent: #D94F2A;
}

[data-palette="night"] {
  --c-bg: #0E1116;
  --c-surface: #151A22;
  --c-surface-2: #1E252F;
  --c-ink: #F4EFE6;
  --c-ink-2: #C9C3B7;
  --c-muted: #8A8478;
  --c-line: #2A313B;
  --c-line-strong: #F4EFE6;
  --c-primary: #F4B223;
  --c-primary-ink: #0E1116;
  --c-accent: #2DB07A;
}

/* ===== Photo treatment ===== */
[data-photo="color"] .photo img,
[data-photo="color"] img.photo { filter: none; }

[data-photo="duotone"] .photo img,
[data-photo="duotone"] img.photo {
  filter: grayscale(1) contrast(1.05) sepia(0.4) hue-rotate(-20deg);
}

[data-photo="bw"] .photo img,
[data-photo="bw"] img.photo {
  filter: grayscale(1) contrast(1.08);
}

/* ===== Base ===== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--c-bg); color: var(--c-ink); }
body {
  font-family: var(--font-body);
  font-size: var(--fs-2);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,h2,h3,h4,h5 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
  color: var(--c-ink);
  text-wrap: balance;
}
h1 { font-size: clamp(44px, 7vw, var(--fs-9)); }
h2 { font-size: clamp(32px, 4.8vw, var(--fs-7)); }
h3 { font-size: clamp(24px, 2.8vw, var(--fs-5)); }
h4 { font-size: var(--fs-4); }

p { margin: 0 0 1em; color: var(--c-ink-2); }
p.lede { font-size: var(--fs-4); color: var(--c-ink); text-wrap: pretty; }

a { color: inherit; }
img { max-width: 100%; display: block; }

/* Utility */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-1);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ""; width: 24px; height: 1px; background: currentColor;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-body); font-weight: 500;
  font-size: var(--fs-2);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
  background: var(--c-primary); color: var(--c-primary-ink);
  border-color: var(--c-primary);
}
.btn--primary:hover { background: var(--c-ink); border-color: var(--c-ink); }
.btn--accent {
  background: var(--c-accent); color: var(--c-accent-ink);
  border-color: var(--c-accent);
}
.btn--ghost {
  background: transparent; color: var(--c-ink);
  border-color: var(--c-line-strong);
}
.btn--ghost:hover { background: var(--c-ink); color: var(--c-bg); }
.btn--sm { padding: 8px 14px; font-size: var(--fs-1); }
.btn--lg { padding: 18px 28px; font-size: var(--fs-3); }
.btn--block { width: 100%; justify-content: center; }
.btn svg { width: 16px; height: 16px; }

/* Cards */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  overflow: hidden;
}

/* Tag / Badge */
.tag {
  display: inline-block; padding: 4px 10px;
  background: var(--c-surface-2); color: var(--c-ink);
  border-radius: var(--r-pill); font-size: var(--fs-0);
  letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
}

/* Divider */
.divider { height: 1px; background: var(--c-line); width: 100%; }

/* Section spacing */
section { padding: clamp(64px, 9vw, 128px) 0; }
section.tight { padding: clamp(40px, 6vw, 80px) 0; }

/* Grid helpers */
.grid { display: grid; gap: var(--s-5); }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
}

/* Photo frame */
.photo { overflow: hidden; background: var(--c-surface-2); }
.photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease, filter .3s ease; }
.photo:hover img { transform: scale(1.03); }

/* Focus */
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 3px; border-radius: 4px; }

/* Scrollbars polish */
::selection { background: var(--c-accent); color: var(--c-accent-ink); }

/* Subtle entrance */
[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .8s ease, transform .8s ease; }
[data-reveal].in { opacity: 1; transform: none; }

/* Forms */
input, select, textarea {
  font: inherit; color: inherit;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  padding: 12px 14px;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--c-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--c-primary) 18%, transparent);
}
label { font-size: var(--fs-1); color: var(--c-ink-2); font-weight: 500; display: block; margin-bottom: 6px; }

/* Accessibility helpers */
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
