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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

.login-container {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    animation: fadeIn 0.4s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.login-header h1 {
    font-size: 28px;
    font-weight: 300;
    color: #1a1a1a;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-header p {
    font-size: 14px;
    color: #666;
    font-weight: 400;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.2s ease;
    background: #fafafa;
    color: #333;
}

.form-group input:focus {
    outline: none;
    border-color: #4285f4;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1);
}

.form-group input::placeholder {
    color: #999;
}

.remember-me-group {
    margin-top: -8px;
}

.remember-me-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 400;
    color: #555;
    text-transform: none;
    letter-spacing: 0;
    user-select: none;
}

.remember-me-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    margin: 0;
    padding: 0;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    background: #fafafa;
    transition: all 0.2s ease;
    appearance: none;
    position: relative;
}

.remember-me-label input[type="checkbox"]:checked {
    background: #4285f4;
    border-color: #4285f4;
}

.remember-me-label input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.remember-me-label input[type="checkbox"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1);
}

.remember-me-label span {
    flex: 1;
}

.login-button {
    padding: 14px 24px;
    background: #4285f4;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.login-button:hover {
    background: #357ae8;
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
    transform: translateY(-1px);
}

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

.login-button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.login-button:disabled:hover {
    background: #ccc;
    box-shadow: none;
    transform: none;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    display: none;
    border-left: 3px solid #c33;
}

.error-message.show {
    display: block;
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}