:root {
  --ink: #090a0d;
  --panel: #15161b;
  --line: #2b2d35;
  --muted: #92949d;
  --white: #ffffff;
  --acid: #f6a044;
  --danger: #ff766f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: var(--ink);
  color: var(--white);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", sans-serif;
  line-height: 1.5;
}
button, input { font: inherit; }

.login {
  width: 100%;
  max-width: 400px;
  padding: 32px 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 1.05rem; letter-spacing: -.02em; }
.brand b { color: var(--acid); font-size: .72rem; letter-spacing: .1em; margin-left: 5px; }
.brand-mark { width: 20px; height: 20px; display: inline-block; background: var(--white); clip-path: polygon(18% 0, 100% 0, 70% 100%, 0 100%); }
h1 { margin: 28px 0 6px; font-size: 2rem; letter-spacing: -.04em; line-height: 1.1; }
.lead { margin: 0 0 24px; color: var(--muted); font-size: .92rem; }

form { display: grid; gap: 16px; }
label { display: grid; gap: 6px; font-size: .82rem; color: #cdced3; }
input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #0f1014;
  color: var(--white);
  font-size: 1rem; /* 16px: iOS does not zoom the page on focus */
}
input:focus { outline: 2px solid var(--acid); outline-offset: 1px; border-color: transparent; }
button {
  margin-top: 4px;
  padding: 14px 17px;
  border: 0;
  border-radius: 10px;
  background: var(--acid);
  color: #17120c;
  font-weight: 750;
  cursor: pointer;
}
button:hover { background: #ffb45f; }
button:disabled { opacity: .5; cursor: wait; }
.error { margin: 0; color: var(--danger); font-size: .88rem; }
.fine { margin: 20px 0 0; color: var(--muted); font-size: .8rem; }