/* Dartutors System - sign-in pages */
:root {
  --ink: #16143A; --ink-2: #4A4868; --ink-3: #75738F;
  --brand: #4F46E5; --brand-ink: #3730A3; --brand-soft: #EEEDFD;
  --paper: #FFFFFF; --mist: #F6F6FB; --line: #E4E3F0;
  --ok: #0E9F6E; --ok-bg: #E3F6EE; --bad: #D9482B; --bad-bg: #FDE8E3;
  --f-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-body: "Albert Sans", "Segoe UI", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.55 var(--f-body); -webkit-font-smoothing: antialiased; }
a { color: var(--brand); text-decoration: none; font-weight: 600; }
a:hover { color: var(--brand-ink); text-decoration: underline; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

.auth { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); min-height: 100vh; }

/* Brand panel: the school's identity. Solid colour, a faint register grid, no photo blends. */
.auth-brand {
  position: relative; overflow: hidden; background: var(--ink); color: #fff;
  padding: 48px 56px; display: flex; flex-direction: column; justify-content: space-between;
}
.auth-brand::before {
  content: ""; position: absolute; inset: 0; opacity: .07; pointer-events: none;
  background-image: linear-gradient(#fff 1px, transparent 1px), linear-gradient(90deg, #fff 1px, transparent 1px);
  background-size: 44px 44px; mask-image: linear-gradient(160deg, #000 20%, transparent 75%);
  -webkit-mask-image: linear-gradient(160deg, #000 20%, transparent 75%);
}
.auth-brand > * { position: relative; }
.auth-school { display: flex; align-items: center; gap: 14px; }
.auth-school .crest { width: 52px; height: 52px; border-radius: 14px; background: #fff; display: grid; place-items: center; overflow: hidden; flex: none; }
.auth-school .crest img { max-width: 44px; max-height: 44px; object-fit: contain; }
.auth-school .crest span { font: 700 1.4rem var(--f-display); color: var(--brand); }
.auth-school strong { font: 700 1.25rem/1.2 var(--f-display); letter-spacing: -.01em; }
.auth-brand h1 { font: 700 clamp(2rem, 3.4vw, 3rem)/1.08 var(--f-display); letter-spacing: -.02em; margin: 0 0 16px; max-width: 12em; }
.auth-brand p { color: #C9C7E6; max-width: 26em; margin: 0; font-size: 1.05rem; }
.auth-roles { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; list-style: none; padding: 0; }
.auth-roles li { font: 500 .78rem var(--f-mono); letter-spacing: .04em; border: 1px solid rgba(255, 255, 255, .22); border-radius: 999px; padding: 6px 12px; color: #E4E2F7; }
.auth-foot { font-size: .85rem; color: #9C9ABD; }

/* Form panel */
.auth-main { display: flex; align-items: center; justify-content: center; padding: 48px 24px; }
.auth-card { width: 100%; max-width: 400px; }
.auth-card h2 { font: 700 1.9rem/1.15 var(--f-display); letter-spacing: -.02em; margin: 0 0 8px; }
.auth-card .sub { color: var(--ink-2); margin: 0 0 32px; }
.field { display: grid; gap: 8px; margin-bottom: 20px; }
.field label { font-weight: 600; font-size: .95rem; }
.field .hint { color: var(--ink-3); font-size: .85rem; }
.field input {
  font: inherit; color: var(--ink); background: var(--paper); width: 100%;
  border: 1.5px solid var(--line); border-radius: 10px; padding: 13px 14px;
}
.field input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.field input.is-invalid { border-color: var(--bad); }
.field .err { color: var(--bad); font-size: .88rem; }
.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 76px; }
.pw-toggle {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  border: 0; background: none; color: var(--brand); font: 600 .85rem var(--f-body); padding: 6px 8px; cursor: pointer; border-radius: 6px;
}
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: -4px 0 24px; font-size: .95rem; }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; color: var(--ink-2); }
.check input { width: 18px; height: 18px; accent-color: var(--brand); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; width: 100%;
  font: 600 1rem/1 var(--f-body); padding: 15px 20px; border-radius: 10px; border: 0; cursor: pointer;
  background: var(--brand); color: #fff; transition: background .15s;
}
.btn:hover { background: var(--brand-ink); }
.notice { border-radius: 10px; padding: 14px 16px; margin-bottom: 24px; font-size: .95rem; }
.notice.ok { background: var(--ok-bg); color: #0A5C41; }
.notice.bad { background: var(--bad-bg); color: #8E2E19; }
.notice.info { background: var(--mist); color: var(--ink-2); border: 1px solid var(--line); }
.help { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--ink-2); font-size: .92rem; }
.help strong { color: var(--ink); }
.back { display: inline-block; margin-top: 24px; font-size: .95rem; }

@media (max-width: 900px) {
  .auth { grid-template-columns: 1fr; }
  .auth-brand { padding: 28px 24px; gap: 20px; }
  .auth-brand h1 { font-size: 1.6rem; margin-bottom: 8px; }
  .auth-brand p, .auth-roles, .auth-foot { display: none; }
  .auth-main { align-items: flex-start; padding: 36px 16px 48px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }