:root, [data-theme="light"] {
    --bg-primary: #F6F6F6;
    --bg-card: #FFFFFF;
    --bg-input: #F0F0F2;
    --border: rgba(0,0,0,0.06);
    --text-primary: #1A1A1A;
    --text-secondary: #6B6F76;
    --text-muted: #9DA0A7;
    --accent: #0666EB;
    --accent-hover: #0555CC;
    --red: #E5243F;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="dark"] {
    --bg-primary: #0A0A0A;
    --bg-card: #131315;
    --bg-input: #1A1A1F;
    --border: rgba(255,255,255,0.06);
    --text-primary: #FFFFFF;
    --text-secondary: #8B8E95;
    --text-muted: #505259;
    --red: #F5365C;
}

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

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-font-smoothing: antialiased;
}

.login-container { width: 100%; max-width: 380px; padding: 20px; }

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.login-header { text-align: center; margin-bottom: 28px; }
.login-header .logo { margin-bottom: 14px; }

.login-header h1 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.login-header p { color: var(--text-muted); font-size: 13px; }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; }

.alert-error {
    background: rgba(229, 36, 63, 0.07);
    border: 1px solid rgba(229, 36, 63, 0.15);
    color: var(--red);
}

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

.form-group label {
    display: block; font-size: 11px; font-weight: 600;
    color: var(--text-muted); margin-bottom: 6px;
    text-transform: uppercase; letter-spacing: 0.06em;
}

.form-group input {
    width: 100%; padding: 11px 14px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text-primary);
    font-size: 14px; font-family: var(--font);
    transition: border-color 0.15s; outline: none;
}

.form-group input:focus { border-color: var(--accent); }
.form-group input::placeholder { color: var(--text-muted); }

.btn-login {
    width: 100%; padding: 12px;
    background: var(--accent); color: white;
    border: none; border-radius: 8px;
    font-size: 14px; font-weight: 600;
    font-family: var(--font); cursor: pointer;
    transition: background 0.15s; letter-spacing: -0.01em;
}

.btn-login:hover { background: var(--accent-hover); }
.btn-login:active { transform: scale(0.99); }

.login-footer { text-align: center; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.login-footer p { color: var(--text-muted); font-size: 12px; }