*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0d0f14;
  --surface:  #141720;
  --border:   #252a3a;
  --text:     #e2e6f0;
  --muted:    #6b7494;
  --dim:      #3d4460;
  --accent:   #1bb0ce;
  --crit:     #ff4d6d;
  --ok:       #43d98c;
  --mono:     'IBM Plex Mono', monospace;
  --sans:     'IBM Plex Sans', sans-serif;
  --radius:   10px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

/* Subtle grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,195,247,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,195,247,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 40px 40px;
  width: 100%;
  max-width: 400px;
  position: relative;
}

/* Top accent line */
.login-card::before {
  content: '';
  position: absolute;
  top: 0; left: 40px; right: 40px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  border-radius: 1px;
}

/* Brand */
.brand {
  text-align: center;
  margin-bottom: 36px;
}

.brand-icon {
  width: 48px; height: 48px;
  background: rgba(27,176,206,0.1);
  border: 1px solid rgba(27,176,206,0.25);
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
}

.brand-icon svg { width: 24px; height: 24px; }

.brand-name {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.brand-sub {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 4px;
}

/* Form */
.form-group {
  margin-bottom: 18px;
}

label {
  display: block;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 7px;
}

input {
  width: 100%;
  background: #0d0f14;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}

input:focus { border-color: var(--accent); }
input::placeholder { color: var(--dim); }

/* Autofill override */
input:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 1000px #0d0f14 inset;
  -webkit-text-fill-color: var(--text);
  caret-color: var(--text);
}

.submit-btn {
  width: 100%;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: #0d0f14;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px;
  cursor: pointer;
  margin-top: 8px;
  transition: opacity 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.submit-btn:hover   { opacity: 0.9; }
.submit-btn:active  { transform: scale(0.99); }
.submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Error message */
.error-msg {
  display: none;
  background: rgba(255,77,109,0.1);
  border: 1px solid rgba(255,77,109,0.25);
  border-radius: 7px;
  color: var(--crit);
  font-family: var(--mono);
  font-size: 12px;
  padding: 10px 14px;
  margin-top: 16px;
  text-align: center;
}
.error-msg.visible { display: block; }

/* Loading state */
.submit-btn .btn-text { display: inline; }
.submit-btn .btn-spinner { display: none; }
.submit-btn.loading .btn-text { display: none; }
.submit-btn.loading .btn-spinner { display: inline; }

/* Footer */
.login-footer {
  margin-top: 32px;
  text-align: center;
  font-size: 10px;
  font-family: var(--mono);
  color: var(--dim);
}