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

:root {
    --black: #061a40;
    --white: #ffffff;
    --gray-100: #eef8ff;
    --gray-200: #cfeefe;
    --gray-600: #49657d;
    --gold: #38bdf8;
    --gold-hover: #0ea5e9;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: var(--font);
    background: linear-gradient(145deg, #f8fcff 0%, #eef8ff 44%, #ffffff 100%);
    color: var(--black);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-container {
    width: 100%;
    max-width: 440px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: 0 30px 80px rgba(6, 26, 64, 0.12);
    padding: 48px 40px;
    border: 1px solid var(--gray-200);
}

.auth-logo {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.auth-logo span { color: var(--gold); }

.auth-subtitle {
    text-align: center;
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 32px;
}

.form-group { margin-bottom: 18px; }
.form-group label {
    display: block;
    font-weight: 500;
    font-size: 0.85rem;
    margin-bottom: 5px;
}
.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--gray-100);
}
.form-group input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.18);
    background: var(--white);
}

.btn-submit {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--gold);
    color: var(--black);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 4px;
}
.btn-submit:hover {
    background: var(--gold-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.28);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--gray-600);
}
.auth-footer a {
    color: var(--gold);
    font-weight: 600;
    text-decoration: none;
}
.auth-footer a:hover { text-decoration: underline; }

.auth-error {
    color: #dc3545;
    font-size: 0.85rem;
    text-align: center;
    margin-top: 12px;
    display: none;
    padding: 10px;
    background: #f8d7da;
    border-radius: var(--radius-sm);
}
.auth-success {
    color: #0b4f8a;
    font-size: 0.85rem;
    text-align: center;
    margin-top: 12px;
    display: none;
    padding: 10px;
    background: #dff6ff;
    border-radius: var(--radius-sm);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-600);
    font-size: 0.85rem;
    text-decoration: none;
    margin-bottom: 20px;
    transition: var(--transition);
}
.back-link:hover { color: var(--black); }

.password-hint {
    font-size: 0.75rem;
    color: var(--gray-600);
    margin-top: 4px;
}

@media (max-width: 480px) {
    .auth-container { padding: 32px 20px; }
    .auth-logo { font-size: 1.6rem; }
}