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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #0a0a0a;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 440px;
}

.login-card {
    background: #0f0f0f;
    border: 1px solid #262626;
    border-radius: 16px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6);
    padding: 48px 40px;
    animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 36px;
}

.lock-icon {
    font-size: 56px;
    margin-bottom: 20px;
    filter: grayscale(1);
    opacity: 0.7;
}

.login-header h1 {
    color: #ffffff;
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

.login-header p {
    color: #737373;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: #a3a3a3;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: #0a0a0a;
    border: 1px solid #262626;
    border-radius: 10px;
    font-size: 15px;
    color: #e5e5e5;
    transition: all 0.2s ease;
}

.form-group input::placeholder {
    color: #525252;
}

.form-group input:focus {
    outline: none;
    border-color: #737373;
    box-shadow: 0 0 0 3px rgba(115, 115, 115, 0.1);
    background: #141414;
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: #262626;
    color: #ffffff;
    border: 1px solid #404040;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-login:hover {
    transform: translateY(-2px);
    background: #404040;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

.btn-login:active {
    transform: translateY(0);
}

.btn-login:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

.btn-loading {
    display: inline-block;
}

.hidden {
    display: none !important;
}

.alert {
    padding: 14px 16px;
    border-radius: 10px;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 500;
}

.alert-error {
    background-color: #1a1a1a;
    color: #a3a3a3;
    border: 1px solid #262626;
}

.login-footer {
    text-align: center;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid #262626;
}

.login-footer p {
    color: #525252;
    font-size: 12px;
    font-weight: 500;
}