:root { --bg: #f4f6f9; --panel: #fff; --text: #1c2430; --muted: #667085; --line: #d9dfe8; --accent: #2563eb; --red: #d63b3b; --red-soft: #fde6e6; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f141b; --panel: #171e27; --text: #e6ebf2; --muted: #93a0b3; --line: #283342; --accent: #6ea0ff; --red: #ff8a8a; --red-soft: #3a1f23; }
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--bg); color: var(--text); font: 15px/1.6 "Segoe UI", Tahoma, "Noto Sans Arabic", Arial, sans-serif; padding: 16px; }
.box { width: min(400px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 28px 26px; box-shadow: 0 6px 24px rgba(16, 24, 40, .10); }
.logo { color: var(--accent); font-size: 30px; text-align: center; }
h1 { font-size: 19px; text-align: center; margin: 6px 0 2px; }
.sub { color: var(--muted); text-align: center; margin: 0 0 20px; font-size: 13px; }
label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
input { width: 100%; font: inherit; color: var(--text); background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; direction: ltr; text-align: left; }
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.msg { margin-top: 14px; padding: 9px 12px; border-radius: 8px; background: var(--red-soft); color: var(--red); font-weight: 600; font-size: 14px; }
button { width: 100%; margin-top: 18px; font: inherit; font-weight: 600; color: #fff; background: var(--accent); border: 0; border-radius: 8px; padding: 11px; cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }