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

:root {
    --bg:      #0f172a;
    --bg2:     #1e293b;
    --border:  rgba(255,255,255,0.08);
    --text:    #f1f5f9;
    --text2:   #94a3b8;
    --text3:   #64748b;
    --accent:  #10b981;
    --accent2: #34d399;
    --danger:  #ef4444;
    --radius:  10px;
    --radius-lg: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    width: 500px; height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(16,185,129,0.07) 0%, transparent 70%);
    top: 0; left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
}

.auth-wrap {
    width: 100%; max-width: 420px;
    position: relative; z-index: 1;
}

.auth-logo {
    text-align: center;
    margin-bottom: 28px;
}

.auth-logo a {
    font-size: 22px; font-weight: 700;
    letter-spacing: -0.4px; color: var(--text);
    text-decoration: none;
}

.auth-logo a span { color: var(--accent); }

.auth-logo p {
    font-size: 13px; color: var(--text3);
    margin-top: 4px;
}

.auth-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.auth-title {
    font-size: 20px; font-weight: 700;
    color: var(--text); margin-bottom: 6px;
}

.auth-subtitle {
    font-size: 14px; color: var(--text2);
    margin-bottom: 24px;
}

.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-size: 13px; font-weight: 500;
    color: var(--text2); margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}

.form-control::placeholder { color: var(--text3); }
.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(16,185,129,0.15);
}
.form-control.error { border-color: var(--danger); }

.form-hint { font-size: 12px; color: var(--text3); margin-top: 4px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.btn {
    display: inline-flex; align-items: center;
    justify-content: center; gap: 6px;
    width: 100%; padding: 11px 20px;
    border-radius: var(--radius);
    font-size: 15px; font-weight: 600;
    border: none; cursor: pointer;
    transition: all .15s ease;
    margin-top: 4px;
}

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent2); color: #0f172a; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.auth-divider {
    display: flex; align-items: center; gap: 12px;
    margin: 20px 0;
    font-size: 12px; color: var(--text3);
}
.auth-divider::before, .auth-divider::after {
    content: ''; flex: 1;
    height: 1px; background: var(--border);
}

.auth-link {
    text-align: center;
    font-size: 14px; color: var(--text2);
    margin-top: 20px;
}

.auth-link a { color: var(--accent); font-weight: 500; }
.auth-link a:hover { color: var(--accent2); }

.alert {
    padding: 11px 14px;
    border-radius: var(--radius);
    font-size: 14px;
    margin-bottom: 16px;
    display: flex; align-items: flex-start; gap: 8px;
}
.alert-danger  { background: rgba(239,68,68,0.12);  color: #fca5a5; border: 1px solid rgba(239,68,68,0.25); }
.alert-success { background: rgba(16,185,129,0.12); color: #6ee7b7; border: 1px solid rgba(16,185,129,0.25); }
.alert-info    { background: rgba(59,130,246,0.12); color: #93c5fd; border: 1px solid rgba(59,130,246,0.25); }

.password-wrap { position: relative; }
.password-wrap .form-control { padding-right: 42px; }
.password-toggle {
    position: absolute; right: 12px; top: 50%;
    transform: translateY(-50%);
    background: none; border: none; cursor: pointer;
    color: var(--text3); padding: 4px;
    display: flex; align-items: center;
}
.password-toggle:hover { color: var(--text2); }
.password-toggle svg { width: 16px; height: 16px; }

.strength-bar { display: flex; gap: 4px; margin-top: 6px; }
.strength-seg { flex: 1; height: 3px; border-radius: 2px; background: var(--border); transition: background .2s; }
.strength-seg.weak   { background: var(--danger); }
.strength-seg.medium { background: #f59e0b; }
.strength-seg.strong { background: var(--accent); }

@media (max-width: 480px) {
    .auth-card { padding: 24px 20px; }
    .form-row { grid-template-columns: 1fr; }
}