*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0c0c16; --surface: #16162a; --border: #2a2a46;
  --accent: #27ae60; --accent2: #3498db; --text: #dde1ee; --muted: #6b7094;
  --input-bg: #0b0b16; --danger: #e74c3c; --radius: 8px;
}
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg); color: var(--text);
  height: 100vh; display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative;
}

/* Ambient gradient glows */
.bg-glow { position: fixed; border-radius: 50%; filter: blur(90px); opacity: .5; pointer-events: none; z-index: 0; }
.bg-glow.g1 { width: 520px; height: 520px; top: -160px; left: -120px;
  background: radial-gradient(circle, #3498db, transparent 70%); animation: drift1 14s ease-in-out infinite; }
.bg-glow.g2 { width: 460px; height: 460px; bottom: -160px; right: -120px;
  background: radial-gradient(circle, #27ae60, transparent 70%); animation: drift2 17s ease-in-out infinite; }
@keyframes drift1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(40px,30px); } }
@keyframes drift2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-40px,-30px); } }

@keyframes cardIn { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: none; } }
.card {
  position: relative; z-index: 1;
  background: linear-gradient(160deg, color-mix(in srgb, var(--surface) 92%, #fff 0%), #12121f);
  border: 1px solid var(--border);
  border-radius: 18px; padding: 38px 36px 30px; width: 370px;
  box-shadow: 0 24px 70px rgba(0,0,0,.6), inset 0 1px 0 rgba(255,255,255,.04);
  animation: cardIn .5s cubic-bezier(.2,.7,.2,1) both;
  text-align: center;
}
.brand { display: flex; justify-content: center; margin-bottom: 16px; }
.brand-glyph {
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  font-size: 26px; border-radius: 16px; color: #fff;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  box-shadow: 0 8px 24px color-mix(in srgb, var(--accent2) 45%, transparent);
}
.card h1 {
  font-size: 26px; font-weight: 800; letter-spacing: -.02em; margin-bottom: 4px;
  background: linear-gradient(90deg, var(--text), color-mix(in srgb, var(--accent2) 75%, var(--text)));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.subtitle { font-size: 13px; color: var(--muted); margin-bottom: 26px; }
form { text-align: left; }
label {
  display: block; font-size: 11px; font-weight: 600; color: var(--muted);
  letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 6px;
}
input {
  display: block; width: 100%; background: var(--input-bg);
  border: 1px solid var(--border); color: var(--text);
  font-size: 14px; padding: 11px 13px; border-radius: var(--radius);
  outline: none; margin-bottom: 16px; transition: border-color .2s, box-shadow .2s;
}
input:focus { border-color: var(--accent2); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent2) 18%, transparent); }
button {
  width: 100%; padding: 12px; border: none; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent2), color-mix(in srgb, var(--accent2) 60%, var(--accent)));
  color: #fff; font-size: 14px; font-weight: 700; cursor: pointer;
  letter-spacing: 0.04em; margin-top: 6px; transition: transform .12s, box-shadow .15s, opacity .15s;
  box-shadow: 0 8px 22px color-mix(in srgb, var(--accent2) 35%, transparent);
}
button:hover { transform: translateY(-1px); box-shadow: 0 12px 28px color-mix(in srgb, var(--accent2) 45%, transparent); }
button:active { transform: translateY(0); }
button:disabled { opacity: 0.5; cursor: default; box-shadow: none; transform: none; }
#error-msg { font-size: 12px; color: var(--danger); margin-top: 14px; text-align: center; min-height: 16px; }
.login-foot { margin-top: 22px; font-size: 10.5px; color: var(--muted); letter-spacing: .04em; text-align: center; }