/*
 * Stoa design tokens — the single source for color/spacing/typography (§2.5).
 * Dark theme: teacher + student portals. Light: admin + parent (v1 convention).
 * All pairings below meet WCAG 2.1 AA contrast on their intended backgrounds.
 * Tailwind consumes these via @theme in assets/tailwind/input.css.
 */

:root {
  /* Color — light theme (admin, parent) */
  --stoa-bg: #f7f8fa;
  --stoa-surface: #ffffff;
  --stoa-surface-raised: #ffffff;
  --stoa-border: #d8dce3;
  --stoa-text: #1a202c;
  --stoa-text-muted: #4a5568;
  --stoa-primary: #1d4ed8;
  --stoa-primary-text: #ffffff;
  --stoa-primary-soft: #dbeafe;
  --stoa-accent: #047857;
  --stoa-danger: #b91c1c;
  --stoa-danger-soft: #fee2e2;
  --stoa-warning: #92400e;
  --stoa-warning-soft: #fef3c7;
  --stoa-success: #065f46;
  --stoa-success-soft: #d1fae5;
  --stoa-focus: #1d4ed8;

  /* Spacing scale (4px base) */
  --stoa-space-1: 0.25rem;
  --stoa-space-2: 0.5rem;
  --stoa-space-3: 0.75rem;
  --stoa-space-4: 1rem;
  --stoa-space-6: 1.5rem;
  --stoa-space-8: 2rem;

  /* Typography */
  --stoa-font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
  --stoa-font-mono: "JetBrains Mono", ui-monospace, monospace;
  --stoa-radius: 0.5rem;
  --stoa-shadow: 0 1px 3px rgb(16 24 40 / 0.08);

  color-scheme: light;
}

/* Dark theme (teacher, student) — selected via <meta name="color-scheme"> or
   a .theme-dark root class on the shell. */
.theme-dark {
  --stoa-bg: #0f1420;
  --stoa-surface: #1a2130;
  --stoa-surface-raised: #232c40;
  --stoa-border: #33405a;
  --stoa-text: #f1f5f9;
  --stoa-text-muted: #a8b3c5;
  --stoa-primary: #3b82f6;
  --stoa-primary-text: #0b1220;
  --stoa-primary-soft: #1e3a8a;
  --stoa-accent: #34d399;
  --stoa-danger: #f87171;
  --stoa-danger-soft: #450a0a;
  --stoa-warning: #fbbf24;
  --stoa-warning-soft: #451a03;
  --stoa-success: #6ee7b7;
  --stoa-success-soft: #022c22;
  --stoa-focus: #93c5fd;

  color-scheme: dark;
}

/* Base element styles — tokens only; component utilities come from Tailwind. */
*,
*::before,
*::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--stoa-font-sans);
  background: var(--stoa-bg);
  color: var(--stoa-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

:where(a) { color: var(--stoa-primary); }
:where(button, a, input, select, textarea):focus-visible {
  outline: 2px solid var(--stoa-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--stoa-primary);
  color: var(--stoa-primary-text);
  padding: var(--stoa-space-2) var(--stoa-space-4);
  border-radius: 0 0 var(--stoa-radius) 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.app-header {
  border-bottom: 1px solid var(--stoa-border);
  background: var(--stoa-surface);
  padding: var(--stoa-space-3) var(--stoa-space-6);
}
.portal-nav { display: flex; align-items: center; gap: var(--stoa-space-4); }
.portal-name { font-weight: 700; letter-spacing: 0.01em; }

.app-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--stoa-space-6);
}

.app-footer {
  border-top: 1px solid var(--stoa-border);
  color: var(--stoa-text-muted);
  padding: var(--stoa-space-4) var(--stoa-space-6);
  margin-top: var(--stoa-space-8);
}

.hero { padding: var(--stoa-space-8) 0; }
.muted { color: var(--stoa-text-muted); }

/* Four-state discipline (§2.5): loading/empty/error/success every region. */
.htmx-indicator { display: none; }
.htmx-request .htmx-indicator, .htmx-request.htmx-indicator { display: inline-block; }
.state-empty { color: var(--stoa-text-muted); padding: var(--stoa-space-6); text-align: center; }
.state-error { color: var(--stoa-danger); background: var(--stoa-danger-soft); padding: var(--stoa-space-4); border-radius: var(--stoa-radius); }

/* Auth card + form inputs (§3.5: tokens only, no inline styles). */
.auth-card {
  max-width: 26rem;
  margin: var(--stoa-space-8) auto;
  padding: var(--stoa-space-6);
  display: grid;
  gap: var(--stoa-space-3);
}
.input {
  width: 100%;
  padding: var(--stoa-space-2) var(--stoa-space-3);
  border: 1px solid var(--stoa-border);
  border-radius: var(--stoa-radius);
  background: var(--stoa-surface-raised);
  color: var(--stoa-text);
  font: inherit;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--stoa-space-2);
  padding: var(--stoa-space-2) var(--stoa-space-4);
  border-radius: var(--stoa-radius);
  border: 1px solid var(--stoa-primary);
  background: var(--stoa-primary);
  color: var(--stoa-primary-text);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.1); }