/* KlystHub : page de connexion. Sombre par défaut, claire si le système l'est. */
:root {
  --bg: #071416; --bg-2: #0c2226; --card: rgba(16, 38, 42, .72); --card-border: rgba(138, 243, 218, .12);
  --text: #e8f5f2; --muted: #8fa9a7; --faint: #5f7a79;
  --input: rgba(7, 20, 22, .65); --input-border: #24454a; --input-hover: #2f5a60;
  --accent: #2ac5a4; --accent-2: #8af3da; --ring: rgba(42, 197, 164, .28);
  --error-bg: rgba(240, 120, 120, .1); --error-border: rgba(240, 120, 120, .28); --error: #f4a3a3;
  --glow-1: rgba(42, 197, 164, .22); --glow-2: rgba(63, 127, 208, .16);
  --shadow: 0 30px 80px -20px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .02) inset;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #eef4f3; --bg-2: #f7faf9; --card: rgba(255, 255, 255, .82); --card-border: rgba(16, 44, 50, .08);
    --text: #12292e; --muted: #6c8486; --faint: #9db0b1;
    --input: #fff; --input-border: #d5e2e0; --input-hover: #b9cfcb;
    --accent: #178577; --accent-2: #2ac5a4; --ring: rgba(23, 133, 119, .18);
    --error-bg: #fdf0f0; --error-border: #f2cccc; --error: #b23f3f;
    --glow-1: rgba(42, 197, 164, .2); --glow-2: rgba(63, 127, 208, .12);
    --shadow: 0 30px 70px -28px rgba(16, 44, 50, .28);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; min-height: 100%; display: grid; place-items: center; padding: 32px 16px;
  background: radial-gradient(1200px 600px at 50% -10%, var(--bg-2), var(--bg));
  color: var(--text); font: 15px/1.5 -apple-system, BlinkMacSystemFont, 'Segoe UI', Ubuntu, Cantarell, 'Noto Sans', sans-serif;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
/* Halo lumineux et trame de points, discrets */
.glow { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.glow::before, .glow::after { content: ''; position: absolute; border-radius: 50%; filter: blur(80px); }
.glow::before { width: 520px; height: 520px; left: 50%; top: 8%; transform: translateX(-75%); background: var(--glow-1); animation: float 14s ease-in-out infinite alternate; }
.glow::after { width: 440px; height: 440px; left: 50%; top: 30%; transform: translateX(5%); background: var(--glow-2); animation: float 18s ease-in-out infinite alternate-reverse; }
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none;
  background-image: radial-gradient(var(--card-border) 1px, transparent 1px); background-size: 26px 26px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
}
@keyframes float { to { translate: 0 40px; } }

.login { position: relative; z-index: 1; width: 100%; max-width: 400px; animation: rise .6s cubic-bezier(.2, .8, .2, 1) both; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
.brand { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 28px; font-size: 24px; font-weight: 650; letter-spacing: -.03em; }
.brand img { border-radius: 12px; box-shadow: 0 10px 30px -8px var(--glow-1); }
.brand b { font-weight: 800; background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.card {
  padding: 34px 32px 30px; border-radius: 22px; background: var(--card); border: 1px solid var(--card-border);
  backdrop-filter: blur(22px) saturate(140%); -webkit-backdrop-filter: blur(22px) saturate(140%); box-shadow: var(--shadow);
}
h1 { margin: 0; font-size: 24px; letter-spacing: -.03em; font-weight: 700; }
.lead { margin: 6px 0 24px; color: var(--muted); font-size: 14px; }

.error {
  display: flex; align-items: center; gap: 10px; margin: -6px 0 20px; padding: 11px 14px; border-radius: 12px;
  background: var(--error-bg); border: 1px solid var(--error-border); color: var(--error); font-size: 13.5px;
  animation: shake .4s ease both;
}
.error svg { flex: none; width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
@keyframes shake { 20%, 60% { transform: translateX(-4px); } 40%, 80% { transform: translateX(4px); } }

.field { display: block; margin-bottom: 16px; }
.field > span:first-child { display: block; margin-bottom: 7px; font-size: 13px; font-weight: 600; color: var(--muted); }
input[type=text], input[type=password] {
  width: 100%; height: 48px; padding: 0 15px; border-radius: 12px; border: 1px solid var(--input-border);
  background: var(--input); color: var(--text); font: inherit; font-size: 15px; outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
input:hover { border-color: var(--input-hover); }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.password { position: relative; display: block; }
.password input { padding-right: 50px; }
.reveal {
  position: absolute; right: 6px; top: 6px; width: 36px; height: 36px; display: grid; place-items: center;
  border: 0; border-radius: 9px; background: none; color: var(--faint); cursor: pointer; transition: color .15s, background .15s;
}
.reveal:hover { color: var(--text); background: var(--ring); }
.reveal:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.reveal svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.reveal .eye-off, .reveal.shown .eye { display: none; }
.reveal.shown .eye-off { display: block; }

.remember { display: flex; align-items: center; gap: 10px; margin: 4px 0 24px; font-size: 14px; color: var(--muted); cursor: pointer; user-select: none; width: fit-content; }
.remember input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.remember .box {
  width: 20px; height: 20px; border-radius: 6px; border: 1.5px solid var(--input-border); background: var(--input);
  display: grid; place-items: center; transition: background .15s, border-color .15s;
}
.remember .box svg { width: 14px; height: 14px; fill: none; stroke: #fff; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; opacity: 0; transform: scale(.6); transition: opacity .15s, transform .15s; }
.remember input:checked + .box { background: var(--accent); border-color: var(--accent); }
.remember input:checked + .box svg { opacity: 1; transform: none; }
.remember input:focus-visible + .box { box-shadow: 0 0 0 4px var(--ring); }
.remember:hover .box { border-color: var(--input-hover); }

.submit {
  position: relative; width: 100%; height: 50px; display: flex; align-items: center; justify-content: center; gap: 10px;
  border: 0; border-radius: 13px; cursor: pointer; font: inherit; font-size: 15.5px; font-weight: 650; color: #04211c;
  background: linear-gradient(135deg, var(--accent-2), var(--accent)); box-shadow: 0 12px 30px -12px var(--accent), 0 1px 0 rgba(255, 255, 255, .35) inset;
  transition: transform .15s, box-shadow .2s, filter .2s;
}
@media (prefers-color-scheme: light) { .submit { color: #fff; } }
.submit:hover { filter: brightness(1.06); box-shadow: 0 16px 36px -12px var(--accent), 0 1px 0 rgba(255, 255, 255, .35) inset; }
.submit:active { transform: translateY(1px); }
.submit:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--ring); }
.submit svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.submit .arrow { transition: transform .2s; }
.submit:hover .arrow { transform: translateX(3px); }
.submit .spinner { display: none; animation: spin .8s linear infinite; }
.submit.busy { pointer-events: none; filter: saturate(.8); }
.submit.busy .arrow { display: none; }
.submit.busy .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.foot { display: flex; align-items: center; justify-content: center; gap: 7px; margin: 22px 0 0; color: var(--faint); font-size: 12.5px; }
.foot svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }

@media (max-width: 440px) {
  .card { padding: 28px 22px 24px; border-radius: 20px; }
  .brand { margin-bottom: 22px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }