/* Light default (Sahil 2026-10-02). Optional light/dark switch via html[data-color-mode]. No forced dark. */
:root, html[data-color-mode="light"] {
  color-scheme: light;
  --bg: #f6f4f2;
  --panel: #ffffff;
  --text: #1a1516;
  --muted: #5c5457;
  --border: #d9d0d3;
  --accent: #c4002f;
  --accent-hover: #a10026;
  --input-bg: #fff;
  --error-bg: #fde8ee;
  --error-text: #8a1230;
  --shadow: 0 0.6rem 1.6rem rgba(26, 21, 22, 0.08);
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
html[data-color-mode="dark"] {
  color-scheme: dark;
  --bg: #121014;
  --panel: #1c191c;
  --text: #f4eef0;
  --muted: #c9bdc1;
  --border: #5b4b50;
  --accent: #e8003d;
  --accent-hover: #ff2458;
  --input-bg: #0e0c0e;
  --error-bg: #310817;
  --error-text: #ffb7c7;
  --shadow: 0 1rem 2.5rem rgba(0, 0, 0, 0.45);
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 2rem; }
.login-panel {
  width: min(100%, 26rem);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  padding: 1.75rem 1.75rem 1.5rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.login-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 0.35rem; }
.login-kicker { margin: 0; color: var(--accent); font: 700 0.75rem/1.2 ui-monospace, "Cascadia Mono", monospace; letter-spacing: 0.08em; text-transform: uppercase; }
.color-mode-switch {
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  padding: 0.35rem 0.7rem;
  font: 600 0.8rem/1 "Segoe UI", system-ui, sans-serif;
  cursor: pointer;
}
.color-mode-switch:hover { border-color: var(--accent); }
.color-mode-switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1 { margin: 0; font-size: clamp(1.6rem, 4vw, 2rem); line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
.login-copy { margin: 0.85rem 0 1.25rem; color: var(--muted); font-size: 0.9rem; line-height: 1.5; }
form { display: grid; gap: 0.45rem; }
label { margin-top: 0.45rem; color: var(--text); font-size: 0.95rem; font-weight: 600; }
input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0.7rem 0.75rem;
  background: var(--input-bg);
  color: var(--text);
  font: 1rem/1.3 "Segoe UI", system-ui, sans-serif;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
button[type="submit"] {
  margin-top: 0.85rem;
  border: 0;
  border-radius: 0;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font: 700 0.95rem/1 "Segoe UI", system-ui, sans-serif;
}
button[type="submit"]:hover { background: var(--accent-hover); }
.login-error {
  margin: 0 0 0.85rem;
  border-left: 3px solid var(--accent);
  padding: 0.55rem 0.7rem;
  background: var(--error-bg);
  color: var(--error-text);
  font-size: 0.85rem;
  line-height: 1.4;
}
@media (max-width: 34rem) {
  .login-shell { padding: 1rem; }
  .login-panel { padding: 1.35rem; }
}