@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400..800&family=DM+Mono:wght@400;500&display=swap');
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:#020202;--s0:#0a0a0a;--s1:#121212;--s2:#1a1a1a;--s3:#252525;--s4:#333;
  --ln:rgba(255,255,255,.06);--ln2:rgba(255,255,255,.12);
  --t0:#ffffff;--t1:#b0b0b0;--t2:#707070;--t3:#404040;
  --acc:#ffffff;--ai:#000000;
  --ok:#4ade80;--ok-s:rgba(74,222,128,.12);
  --sh:0 4px 12px rgba(0,0,0,.5);--sh-lg:0 8px 32px rgba(0,0,0,.8);
}
body.light {
  --bg:#ffffff;--s0:#f9f9f9;--s1:#f0f0f0;--s2:#e5e5e5;--s3:#dbdbdb;--s4:#cccccc;
  --ln:rgba(0,0,0,.06);--ln2:rgba(0,0,0,.12);
  --t0:#000000;--t1:#333333;--t2:#666666;--t3:#999999;
  --acc:#000000;--ai:#ffffff;
  --ok:#16a34a;--ok-s:rgba(22,163,74,.1);
  --err:#dc2626;--err-s:rgba(220,38,38,.1);
}

body {
  background: var(--bg); color: var(--t0);
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  transition: background .3s, color .3s; padding: 20px;
}
body::before {
  content: ''; position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.015) 1px, transparent 1px);
  background-size: 40px 40px; pointer-events: none; z-index: 0;
}

.container { width: 100%; max-width: 400px; position: relative; z-index: 1; animation: slideUp .35s ease both; }
@keyframes slideUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

.logo-area { text-align: center; margin-bottom: 28px; }
.logo-icon { width: 52px; height: 52px; border-radius: 13px; overflow: hidden; margin: 0 auto 12px; border: 1px solid var(--ln2); }
.logo-icon img { width: 100%; height: 100%; object-fit: cover; display: block; }
.logo-area h1 { font-size: 20px; font-weight: 800; letter-spacing: 0.5px; }
.logo-area p { font-size: 12px; color: var(--t2); margin-top: 6px; font-family: 'DM Mono', monospace; }

.card {
  background: var(--s1); border: 1px solid var(--ln); border-radius: 16px;
  padding: 28px; box-shadow: var(--sh-lg);
}
.card-title { font-size: 16px; font-weight: 800; margin-bottom: 4px; }
.card-sub { font-size: 12px; color: var(--t2); margin-bottom: 22px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 11px; font-weight: 800; color: var(--t2); letter-spacing: .6px; margin-bottom: 7px; }
.input-wrap { position: relative; }
.input-wrap i.icon {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  font-size: 12px; color: var(--t3); pointer-events: none;
}
.input-wrap input {
  width: 100%; background: var(--s2); border: 1px solid var(--ln2);
  color: var(--t0); font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 13px; font-weight: 600; padding: 11px 14px 11px 36px;
  border-radius: 10px; outline: none; transition: all .2s;
}
.input-wrap input::placeholder { color: var(--t3); }
.input-wrap input:focus { border-color: var(--acc); background: var(--s3); }

.eye-btn {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--t3); cursor: pointer;
  font-size: 12px; padding: 4px; transition: color .2s;
}
.eye-btn:hover { color: var(--t1); }

/* Strength bar */
.strength-bar { display: flex; gap: 4px; margin-top: 7px; }
.strength-seg { flex: 1; height: 3px; border-radius: 3px; background: var(--s3); transition: background .3s; }
.strength-seg.weak   { background: var(--err); }
.strength-seg.medium { background: #facc15; }
.strength-seg.strong { background: var(--ok); }
.strength-label { font-size: 10px; font-family: 'DM Mono', monospace; margin-top: 4px; color: var(--t3); }

/* Alert */
.alert {
  display: none; padding: 10px 14px; border-radius: 9px; font-size: 12px; font-weight: 600;
  margin-bottom: 14px; align-items: center; gap: 8px;
}
.alert.show { display: flex; }
.alert.error   { background: var(--err-s); color: var(--err); border: 1px solid rgba(248,113,113,.2); }
.alert.success { background: var(--ok-s);  color: var(--ok);  border: 1px solid rgba(74,222,128,.2); }

.btn-primary {
  width: 100%; padding: 13px; background: var(--acc); color: var(--ai); border: none;
  border-radius: 11px; font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 13px; font-weight: 800; letter-spacing: .4px; cursor: pointer;
  transition: all .2s; display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-primary:hover { opacity: .88; transform: translateY(-1px); box-shadow: var(--sh); }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; transform: none; }

.footer { text-align: center; margin-top: 22px; font-size: 13px; color: var(--t2); }
.footer a { color: var(--t0); text-decoration: none; font-weight: 700; transition: opacity .2s; }
.footer a:hover { opacity: .7; }

.field-err input { border-color: var(--err) !important; }
.field-msg { font-size: 10px; color: var(--err); margin-top: 5px; font-family: 'DM Mono', monospace; display: none; }
.field-err .field-msg { display: block; }

.theme-btn { position: absolute; top: 20px; right: 20px; background: var(--s1); border: 1px solid var(--ln); color: var(--t1); width: 36px; height: 36px; border-radius: 10px; cursor: pointer; transition: all .2s; z-index: 10; display: flex; align-items: center; justify-content: center; }
.theme-btn:hover { background: var(--s2); color: var(--t0); }

@keyframes spin { to { transform: rotate(360deg); } }
.spinner { animation: spin .7s linear infinite; }