:root {
    --bg-deep: #0D1117;
    --bg-surface: #161B22;
    --bg-elevated: #21262D;
    --text-primary: #E6EDF3;
    --text-secondary: #7D8590;
    --text-muted: #484F58;
    --border-color: rgba(255, 255, 255, 0.08);
    --accent: #6EE7B7;
    --accent-hover: #A7F3D0;
    --accent-rgb: 110, 231, 183;
    --error: #F87171;
}

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

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 32px 32px;
    text-align: center;
}

.login-brand {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.login-tld {
    color: var(--accent);
    font-weight: 600;
}

.login-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: left;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    padding: 10px 14px;
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s ease;
}

.form-group input:focus {
    border-color: rgba(var(--accent-rgb), 0.5);
}

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

.error-msg {
    font-size: 0.82rem;
    color: var(--error);
    min-height: 20px;
    line-height: 1.4;
}

.login-btn {
    padding: 11px;
    background: var(--accent);
    color: #0D1117;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.login-btn:hover { opacity: 0.85; }
.login-btn:active { opacity: 0.7; }
.login-btn:disabled { opacity: 0.4; cursor: default; }

.change-pw-notice {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    padding: 10px 14px;
    background: rgba(var(--accent-rgb), 0.08);
    border-radius: 8px;
    border: 1px solid rgba(var(--accent-rgb), 0.2);
}

.login-footer {
    margin-top: 20px;
    text-align: center;
}

.forgot-link {
    font-size: 0.78rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.15s ease;
}

.forgot-link:hover { color: var(--text-secondary); }

@media (max-width: 480px) {
    .login-card {
        padding: 32px 24px 24px;
        border-radius: 12px;
    }
}